A plaque pays tribute to the artist's longtime London home.

Artists and musicians now rule over this former rail station.

Eighty million natural history specimens call this gargantuan museum home.

This hidden green space is the city's second largest conservatory.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This overlooked street light once served as a KGB dead letter box.

Traveling collection of amazing automata.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

A tongue-in-cheek arcade where the games are based on everyday life.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

A mysterious artist-run cabinet of curiosities and library.

One part local history, 99 parts gruesome haunted house.

The world's oldest optical museum is an odd collection where the exhibits look at you.

The longest hedge maze in the world.

These ruins are a monument to the region's industrial heritage, and the site of England's worst mining tragedy.

A tiny chapel perched along a 14th-century bridge.

This memorial is dedicated to the hundreds of soldiers from Featherstone who died fighting World War I.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

Artists have long been drawn to these atmospheric 12th-century ruins.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Catacombs turned marketplace.