Subterranea Britannica

The UK society for studying man-made and man-used underground places. Discover mines, tunnels, nuclear bunkers, caves, military defences and more.

[Subterranea Britannica @subbrit]

We now only post on Instagram, Threads, and BlueSky with the same handle: subbrit.
We have a page on Facebook too.
Follow us there.
Join as a member to learn more about hidden places from our: online forum, magazine, events and site visits https://t.co/7YZwNxoUZC

[Battle of Britain Bunker @BofBBunker]

🔓 Open House Weekend: Visit the Generator House
Step inside a rarely seen part of the Battle of Britain Bunker – the Generator House, once vital for backup power during WWII.
🎟️ 13-21 Sept
📅 Find out more here: https://t.co/X3xxy0gMjO

[Chief Observer @NIBunker]

Open again this Saturday if anyone wants to drop by.

[Joe Brown @JoeBrownLondon]

#OnThisDay 54 years ago the Victoria Line opened between Victoria and Brixton via Vauxhall and Stockwell (Pimlico opened in 1972). It was intended to continue to Streatham Hill, Streatham, and Norbury but never made it beyond here. More @tubemapper magic https://t.co/h5VLqqzPx3

[OldLiverpoolRailways @ORailways]

😮Network Rail has just uncovered after being sealed for decades! the original 1849 rope winding vault for the Victoria Tunnel at Edge Hill. As with the Wapping and Lime Street tunnels, it used a steam-powered rope haulage system to pull rolling stock up from the docks

[Rotherhithe Connections - People & Place @IRotherhithe]

OTD 25March 1843 Thames Tunnel opened to the public
The Ist sub aqueous tunnel in the world
Built between 1825 &1843 using Marc Isambard Brunel's & Thomas Cochrane's newly invented tunnelling shield technology by Brunel & his son Isambard Kingdom Brunel
https://t.co/0vWvkFfG7x

[Tunnelling Journal @tunnel_journal]

The UK’s power provider, National Grid has received full planning approval for the Grain to Tilbury project from Thurrock Council in Essex and Gravesham Borough Council in Kent, a key milestone in strengthening the UK’s energy network

https://t.co/7HqnOHktLH

[Battle of Britain Bunker @BofBBunker]

Amazing opportunity to join other uniformed groups for a sleepover under the Spitfires and Hurricane’s at the Battle of Britain Bunker. This normally sold out event has a cancellation for the 22/23rd March.

For more details contact our Education team at [email protected]

[ianVisits @ianvisits]

New tours reveal Green Park tube station's disused tunnels and wartime bedrooms

https://t.co/tiEDe6M2ZP

Green Park tube station is famous for the long tunnels between its platforms, but hidden behind small anonymous doors is an even larger tube station with a deep hist...

[colin furze @colin_furze]

New 2nd channel video tomorrow and getting closer to a main channel video to. But as you can see #secretgarage is taking shape. #colinfurze #secrettunnel #engineering

[Subterranea Britannica @subbrit]

@MEIRIONYDDPHOTO @deaconbluemusic @LeadbetterHT @heraldscotland No idea sorry

[Subterranea Britannica @subbrit]

The register is not available to the Ggeneral public.

[Department for Science, Innovation and Technology @SciTechgovuk]

The National Underground Asset Register (NUAR) will ensure that critical works like repairing power lines & fixing water mains can happen, improving worker safety, reducing delays and benefiting the economy over £400m per year.

NUAR will safeguard Christmas for years to come 🎄

[Clive Holden @cliveinkent]

East Casemates - Fort Clarence, Rochester. June 2020

[Cornwall Live @CornwallLive]

Nuclear war bunker by the sea keeps chilling secrets underground
The hidden time capsule opens to the public on selected dates each year
https://t.co/NiRpBqUTq0

[Rotherhithe Connections - People & Place @IRotherhithe]

OTD12Dec 1849 Death of Sir Marc Isambard #Brunel
Most famous achievement #ThamesTunnel 1825-1843 made possible by 1818 #tunnellingshield patent jointly with Sir Thomas Cochrane
Many other projects including designing machinery to automate production of pulley blocks for RoyalNavy

[colin furze @colin_furze]

This looks epic, seeing the how the tunnel and garage sit round the house and the bunker at the bottom of the garden just waiting to be connected, you know where to find it, see you there. #colinfurze #secretgarage #engineering #selfbuild #secrettunnel #diy #bunker #3dscanning

[Subterranea Britannica @subbrit]

https://t.co/siLY3i1SPz

[Rotherhithe Connections - People & Place @IRotherhithe]

December 4 St Barbara's FeastDay & #WorldTunnellingDay
St Barbara the Patron Saint of Tunnellers
Traditionally Saint's statue placed by entrance of a tunnelling project to protect tunnellers
Brunel's #ThamesTunnel & #rotherhitheroadtunnel 2 important tunnels here in #rotherhithe

[Jane sidell @InspectorSidell]

Very much looking forward to the next @LonMidArchSoc talk, Dec 19th on the Southwark Deep Shelters, https://t.co/4V0FmB2RGS

[Marcus Cribb @mcribbHistory]

"The forgotten street found behind a hidden library door.

Behind a door deep within the lower floors of the National Library of Scotland lies a forgotten street which gives a glimpse of how Edinburgh looked centuries ago."

https://t.co/ZQFKuAcvKY