Subterrenea Britannica @subbrit.bsky.social · 28/09/2026For there to be more visits to underground sites, there needs to be more people organising them. Get in touch if you can help. 000
Subterrenea Britannica @subbrit.bsky.social · 26/09/2026www.youtube.com/watch?v=JixW...youtube.comInside HS2’s Only Double Track Tunnel - The Giant Copthall Tunnel!Away from the politics and the noise, from the debates about costs and benefits, the various teams at HS2 are quietly and diligently getting on with delivering some of the most remarkable engineering… 011
Subterrenea Britannica @subbrit.bsky.social · 21/09/2026We have informal 'Sub Pub' meet ups for members in London. To join them, or hold your own elsewhere get in touch. 010
Subterrenea Britannica @subbrit.bsky.social · 14/09/2026To get our magazine, events, site visits and online forum, become one of our members at www.subbrit.org.uk/membership 021
Subterrenea Britannica @subbrit.bsky.social · 07/09/2026cumbriacrack.com/2026/05/28/5...cumbriacrack.com£50 million secured to fix Bransty Tunnel – but reopening date remains out of sight – cumbriacrack.com£50 million has been secured to fix and upgrade West Cumbria’s Bransty Tunnel – but its reopening date remains out of sight. 010
Subterrenea Britannica @subbrit.bsky.social · 07/09/2026There are lots of great underground sites for the public to explore. Check them out on our website www.subbrit.org.uk/categories/place… 030
Subterrenea Britannica @subbrit.bsky.social · 06/09/2026Sat 19 Sep - Sun 20 Sep 2026 10:00 - 16:00 cadw.gov.wales/open-doors-d...cadw.gov.walesOpen Doors - Dolaucothi Goldmines | CadwEnjoy free site entry at the only known Roman gold mine in the UK. Explore the mine yard, try panning for gold, visit the machinery sheds and small museum. You will also have free access to… 000
Subterrenea Britannica @subbrit.bsky.social · 06/09/2026www.ianvisits.co.uk/articles/tfl... @ianvisitsianvisits.co.ukTfL building a fake tube tunnel to prepare for one of its trickiest track upgradesTfL is preparing to rebuild one of the Underground’s most complicated junctions, with the work expected to require a substantial closure around Aldgate. 010
Subterrenea Britannica @subbrit.bsky.social · 31/08/2026We'd love fuller historical information about underground sites - those currently on our website and any that are not. If you can provide it (without extensive copying), please get in touch. 010
Subterrenea Britannica @subbrit.bsky.social · 27/08/2026www.bbc.co.uk/news/article...bbc.co.ukThe tunnels built to protect Rochester workers in World War TwoThe Shorts Brothers, Horace, Eustace and Oswald, are fondly remembered in Rochester. 011
Subterrenea Britannica @subbrit.bsky.social · 26/08/2026www.bbc.co.uk/news/article...bbc.co.ukCold War: Former nuclear bunker now home to more than a million government filesHistoric environment records are being stored in what used to be an emergency hub in case of a nuclear bomb. 000
Subterrenea Britannica @subbrit.bsky.social · 26/08/2026youtu.be/dczmSmhTNe4?...youtu.beThe Hidden Tunnels Under Preston Station, Lancashire #railwaysIn this Video we look at the network of Tunnels that exist under Preston Railway Station Lancashire and what they were used for. #preston #tunnels #railwaystation 011
Subterrenea Britannica @subbrit.bsky.social · 24/08/2026Some stuff about underground places on our web pages is getting old! Please send us your newer photos and details about their condition and status, using the 'Submit an update' on every site page. 010
Reposted by Subterrenea BritannicaJodi @squirmelia.bsky.social · 15/08/2026A fun day out with @subbrit.bsky.social! Dodged dragon's teeth, wandered through the woods, walked along a railway track and into the Golgotha tunnel. Visited a signal box, Elvington Heritage Centre and the Kent Mining Museum. 041
Subterrenea Britannica @subbrit.bsky.social · 17/08/2026For there to be more visits to underground sites, there needs to be more people organising them. Get in touch if you can help. 020
Subterrenea Britannica @subbrit.bsky.social · 14/08/2026TOUR: Achtercairn nuclear bunker converted to museum 12 Sept 2026 Behind-the-scenes collections tours will provide access to museum objects and archives that are not normally on display www.doorsopendays.org.uk/regions/high... #DoorsOpenDays Scotlanddoorsopendays.org.ukDoors Open Days | Gairloch MuseumYour donation helps keep doors open! 011
Subterrenea Britannica @subbrit.bsky.social · 14/08/2026We're visiting mining related sites in Kent this Saturday. If you spot us, come say hello if you'd like to learn more about our underground society eastkentrailway.co.uk elvingtonandeythorneheritage.org.uk www.kentminingmuseum.co.uk #SubbritEvents 020
Subterrenea Britannica @subbrit.bsky.social · 14/08/2026TOURS: Radar filter room, inverness 13 September 2026 www.doorsopendays.org.uk/regions/high... by Doors Open Days Scoltand #DoorsOpenDaysdoorsopendays.org.ukDoors Open Days | Emergency Operations Bunker Behind the RadarYour donation helps keep doors open! 020
Subterrenea Britannica @subbrit.bsky.social · 13/08/2026The folks who run Fort Widley, Portsmouth, and its former #ColdWar Control Centre have a grant to unlock and tell its story. They want to learn what matters to potential visitors to improve access, interpretation and visitor experience of the site. Complete their survey. forms.gle/XYEnfQZrni6y...forms.gleUncovering the hidden history of a Cold War BunkerWe welcome your views. An exciting new heritage project, led by Peter Ashley Activity Centres with funding from the National Heritage Lottery Fund, is set to explore the future of the hidden Cold Wa... 020
Reposted by Subterrenea BritannicaJodi @squirmelia.bsky.social · 10/08/2026My hi vis has arrived, looking forward to Saturday! 041
Subterrenea Britannica @subbrit.bsky.social · 10/08/2026We have informal 'Sub Pub' meet ups for members in London. To join them, or hold your own elsewhere get in touch. 010
Subterrenea Britannica @subbrit.bsky.social · 03/08/2026To get our magazine, events, site visits and online forum, become one of our members at www.subbrit.org.uk/membership 000
Subterrenea Britannica @subbrit.bsky.social · 02/08/2026We still have a few places on this trip for the “full board” option. Get in touch if you’re interested and have questions before signing up! 000
Subterrenea Britannica @subbrit.bsky.social · 30/07/2026youtube.comThe Secret History Of Kings Cross Station | S02 E06 Full Episode | Secrets of the London UndergroundTim Dunn and Siddy Holloway explore Kings Cross St Pancras, including a secret siding and the disused Thameslink station. Stream full episodes of Secrets Of The London Underground for free on U:… 010
Subterrenea Britannica @subbrit.bsky.social · 29/07/2026bbc.co.ukHindhead Tunnel marks 15 years of ending 'famous' queuesThe Hindhead Tunnel was built after decades of severe congestion on the A3. 000
Subterrenea Britannica @subbrit.bsky.social · 29/07/2026The basement of Trent House now forms part of a new museum 'House of Secrets'. It has been set up to show how the secret listeners did their work during the period that it was a prisoner of war facility. Enfield, London. trentparkhouse.org.uktrentparkhouse.org.ukHomeDiscover one of London’s grandest houses and the incredible story of the Secret Listeners that has remained hidden for over 70 years. 001
Subterrenea Britannica @subbrit.bsky.social · 28/07/2026Last chance to sign up for this visit next week. 000
Subterrenea Britannica @subbrit.bsky.social · 27/07/2026There are lots of great underground sites for the public to explore. Check them out on our website www.subbrit.org.uk/categories/place… 010
Subterrenea Britannica @subbrit.bsky.social · 26/07/2026WALK: From near #Priddy to #EbborGorge via #Westbury ROC post and beacon www.subbrit.org.uk/sites/westbu... Sign up at mendiphills-nl.org.uk/event/23246/mendiphills-nl.org.ukIce Age to Cold War - A Guided Walk - Mendip Hills National LandscapeWould you like to experience a walk where a distance of just over one mile takes you on a journey through more than a million years of history? If […] 020
Subterrenea Britannica @subbrit.bsky.social · 25/07/2026VISITS: Hamburg WWII sites: 2-5 October 2026 * Steintorwall Bunker, Hamburg Station * Berlinertor Bunker * Wilhemsburg Flak Tower * Submarine Bunker Valentin nr Bremen * Fortress Grauerort Organised with Martin Kaule as East Germany 2024 & Brno 2025. To come join & sign up at www.subbrit.org.uksubbrit.org.ukHome – Subterranea BritannicaSubterranea Britannica is a society devoted to the study and investigation of man-made (including Nuclear Bunkers) and man-used underground places. 020
Reposted by Subterrenea BritannicaWilliamson's Tunnels @fowt.bsky.social · 11/07/2026Oh, this will definitely be worth visiting whilst in Llandudno. It looks similar to Liverpool's Dingle Reservoir... @subbrit.bsky.social www.dailypost.co.uk/whats-on/wha...dailypost.co.ukLlandudno's 'sunken palace' reservoir could become resort's latest attractionPlans confirmed as funding secured to take first steps to turn hidden Victorian reservoir into one of North Wales' most distinctive visitor attractions 033
Reposted by Subterrenea BritannicaianVisits @ianvisits.co.uk · 25/07/2026Coombe Conduit in New Malden is open today and tomorrow. www.ianvisits.co.uk/calendar/occ... 0131
Subterrenea Britannica @subbrit.bsky.social · 24/07/2026VISIT: East Kent Railway Tunnel, military command post & Kent Mining Museum Saturday 15 August 2026 Full day exploring 3 linked sites tracing the story of the Kent coalfield/.. To come, join as a member then sign up at www.subbrit.org.uk/events/ 010
Subterrenea Britannica @subbrit.bsky.social · 23/07/2026VISIT: Nothe Fort and Cold War bunker in Weymouth, Monday 3 August 11am-4pm. After a short introductory talk we'll splitting into 3/4 groups to take turns exploring the bunker — each tour lasting around 25 minutes. To come along, join as a member, then sign up. www.subbrit.org.uk/sites/nothe-...subbrit.org.ukNothe Fort, Weymouth – Subterranea BritannicaSubterranea Britannica is a society devoted to the study and investigation of man-made (including Nuclear Bunkers) and man-used underground places. 000
Subterrenea Britannica @subbrit.bsky.social · 23/07/2026MEET-UP in central London for underground chat: #SubPub from 5.30pm next Wednesday on 29 July 2026. Non-members welcome, sign up at www.eventbrite.co.uk/e/sub-pub-lo... Members sign up via our portal.eventbrite.co.ukSub Pub - London (Waterloo Station)Drop in for an informal gathering to meet like-minded subterranean explorers and enthusiasts. Open to members and non-members. 000
Subterrenea Britannica @subbrit.bsky.social · 23/07/2026www.bbc.co.uk/news/article...bbc.co.ukInside Bridgend's hidden Cold War nuclear bomb bunkerAt the height of Cold War tensions, the UK had plans about what to do if a nuclear strike happened. 000
Subterrenea Britannica @subbrit.bsky.social · 20/07/2026We'd love fuller historical information about underground sites - those currently on our website and any that are not. If you can provide it (without extensive copying), please get in touch. 000
Subterrenea Britannica @subbrit.bsky.social · 13/07/2026Some stuff about underground places on our web pages is getting old! Please send us your newer photos and details about their condition and status, using the 'Submit an update' on every site page. 010
Subterrenea Britannica @subbrit.bsky.social · 09/07/2026youtu.be/6TUwolKi5d4?...youtu.beThe Rhondda Tunnel. Past, Present and FutureThe Rhondda Tunnel. A look at its history, the plan for its future, and a look at what’s down there. Blocked off at both ends, but there is a vision for its future. Music from #Uppbeat (free for… 000
Subterrenea Britannica @subbrit.bsky.social · 09/07/2026youtu.be/nKoB21KLkjE?...youtu.beInside Britain's Secret WWII Fortress | Britain's Most Historic Towns Season 2 Episode 1The Town That Saved Britain's Army | Britain's Most Historic Towns Season 2 Episode 1 Discover how Dover became Britain's frontline fortress during World War II. From the secret tunnels beneath… 010
Subterrenea Britannica @subbrit.bsky.social · 06/07/2026For there to be more visits to underground sites, there needs to be more people organising them. Get in touch if you can help. 000
Subterrenea Britannica @subbrit.bsky.social · 01/07/2026VISIT: Drakelow Tunnels Shadow Factory, RSG & RGHQ + Kinver Edge and Rock Houses, West Midlands. 5 July. To come with us you'll need to become one of our members if not already. Sign up at www.subbrit.org.uk/events/ More info: www.subbrit.org.uk/sites/drakel... www.subbrit.org.uk/sites/holy-a...subbrit.org.ukDrakelow WW2 Shadow Factory RSG and RGHQ – Subterranea BritannicaSubterranea Britannica is a society devoted to the study and investigation of man-made (including Nuclear Bunkers) and man-used underground places. 000
Subterrenea Britannica @subbrit.bsky.social · 01/07/2026Guildford Council are “concerned with filling the void of the bunker which is now considered to be structurally unstable as the floor has failed and cracks have appeared.” at York Road WWll Air Raid Shelter. publicaccess.guildford.gov.uk/online-appli... NOT the Foxenden Quarry Air Raid Shelter 000
Subterrenea Britannica @subbrit.bsky.social · 30/06/2026youtu.be/gMxDw3CNURk?...youtu.beThe Last in Line London Defence: Henley FortHenley Fort, Guildford, Surrey Mobilisation / Artillery / Ammunition / Fort / Communication Come with us to Henley Fort, the last in the line and furthest west of the London Defence… 010
Subterrenea Britannica @subbrit.bsky.social · 30/06/2026VIDEO: youtu.be/UCFc2XvCn2o?... See also en.wikipedia.org/wiki/Shornem...youtu.beI Found Flooded Tunnels Beneath This Abandoned FortShornemead Fort is one of the Thames Estuary's forgotten military defences. Although much of the Victorian fort has disappeared, its underground tunnels still remain—many of them now flooded. In… 010
Subterrenea Britannica @subbrit.bsky.social · 29/06/2026kentonline.co.ukCouncil keeps having to fix manhole after TikTok video exposes secret sheltersReckless copycats inspired by an urban explorer on TikTok keep climbing inside a manhole to access a hidden network of air-raid shelters. 010
Subterrenea Britannica @subbrit.bsky.social · 29/06/2026www.bbc.co.uk/news/videos/...bbc.co.ukGuernsey school classes in WW2 bunker to keep cool in hot weatherPupils at La Houguette Primary have been trying different things to keep cool in the hot weather. 010
Subterrenea Britannica @subbrit.bsky.social · 29/06/2026We have informal 'Sub Pub' meet ups for members in London. To join them, or hold your own elsewhere get in touch. 020
Subterrenea Britannica @subbrit.bsky.social · 28/06/2026Tickets still available for this trip next weekend! If you are not one of our members and want to come, sign up on our website! 020
Subterrenea Britannica @subbrit.bsky.social · 22/06/2026To get our magazine, events, site visits and online forum, become one of our members at www.subbrit.org.uk/membership 010