A network of concealed passageways lies within a busy London Underground station.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

A hands-off space for graffiti artists to hone and display their skills.

This 1920s Dutch barge is now a floating bookstore.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

One part local history, 99 parts gruesome haunted house.

360° views of the city plus five floors of optical illusions and hands-on science.

Banksy gives themself artistic license with this piece of London street art.

A kaleidoscopic warehouse-maze of handmade neon signs.