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Underground explorer online community celebrated in video

We discover Churchill's secret Second World War bunker with underground explorers Subterranea Britannica in this video.

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Have you ever dreamed of being an Internet celebrity? Having thousands of followers chanting your name? Getting more likes than Lady Gaga?

Now's your chance! CNET UK is on the lookout for Britain's most weird and wonderful online communities. Maybe you enjoy dressing up as computer game characters on the weekends? Perhaps you and your mates are the world's most avid Dungeons & Dragons fans? Maybe your idea of fun is getting together and coding Android apps in a 72 hour hackathon? Or do you have a crime fighting alter ego who stalks the streets of Basildon in a brightly coloured cape?

Whatever it is, if you're part of a community and you organise yourselves online, I want to hear about it. The geekier and more outlandish the better. Tell me in the comments below, and if we like the sound of it I'll come and make a film about you to be broadcast right here in this very browser window.

To kick off the series I've been plumbing the depths with members of Subterranea Britannica, an online community dedicated to unearthing and exploring Britain's abandoned underground spaces. From disused tube stations to old nuclear submarine bases, their members get together to discover the hidden world beneath our feet. Click play to see them exploring Winston Churchill's secret spooky World War II bunker in London.

It was built as a back-up headquarters for the war effort in case the Cabinet War Rooms in Westminster were bombed. In the end it was never used, and after the war fell into disrepair. But it makes for some pretty stunning footage. If you'd like to get involved with Sub Brit, you can contact them via their website.

Which online community would you like to see featured next? Holler at us in the comments below or on our Facebook page.