The canine-themed book collection claims to be Europe's largest dog library.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

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

A little slice of Japan and its aesthetics in London's Holland Park.

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

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

A mysterious artist-run cabinet of curiosities and library.

Artists and musicians now rule over this former rail station.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This secluded walkway overlooks a magnificently wild London green space.

This coffee shop lies hidden beneath a historic church.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

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

This 1920s Dutch barge is now a floating bookstore.