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

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

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

This 1920s Dutch barge is now a floating bookstore.

A kaleidoscopic warehouse-maze of handmade neon signs.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Large collection from the 3rd millennium BCE.

Copenhagen's celebrated theme park and gardens.

Abandoned railway line circling the city of Paris.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This stately estate house features a tower covered in a bright, modern mural.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.