A 20 mile tunnel almost as big as a tube tunnel is to be dug under South London, linking Wimbledon to Crayford near Dartford, via New Cross.
A hidden series of tunnels and lift shafts lie out of sight under Piccadilly Circus, and now tours are offered of these hidden spaces.
Deep under a central London office block can be found a warren of shops -- all selling silverware in small rooms behind a bank vault of an entrance.
A Victorian era sewer running over the top of Baker Street tube station is currently being repaired even as it still carries away our daily waste.
The London Transport Museum has announced a new batch of tours in its Hidden London series of disused parts of the London Underground.
In WW2 tunnels deep under Clapham there’s a farm that’s normally sealed off for hygiene reasons, but now, small tours are being arranged.
Down an unmarked gravel path behind a parish church in a small village in the countryside, can be found a nuclear bunker, and you can go inside it.
The last of the Crossrail stations to be shown off to the public opened its doors today, giving visitors a sneak preview of what the Elizabeth line station will look like when it opens in December.
The first of the giant tunnel boring machines that will dig the "super sewer" underneath the Thames has been lowered into position, some 53 metres below ground.
A couple of weeks back the two cutting heads that will drill the new super sewer under London were shown off in a public open day.
Following his six month residency at Growing Underground, a farm 33 metres underground in Clapham, Llew Watkins is presenting five sculptures in one of the uninhabited tunnels.
Deep under the City of London lies its oldest deep level tube station, in use for less than a decade before it closed in 1900, now it's about to get a new lease of life.
A basement off Tottenham Court Road is currently hosting a photo exhibition of other very much grander subterranean spaces from across the world.
Deep under a housing estate in North London lies one of WW2’s greatest secrets, the reserve Cabinet War Rooms that lay hidden and waiting, just in case the (now) more famous Westminster bunkers were destroyed.