Places crouchdown Wants to Go

Apartment complexes built into huge repurposed natural gas tanks.

A bronze statue of the fictional character nicknamed "Mrs. Hat" from a beloved Belgian comedy.

This cannonball has been lodged in the church wall since a 1695 bombardment destroyed the city center.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

William Smith's iconic "map that changed the world" is hidden behind a curtain in the Geological Society building.

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

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

Pop culture has helped to keep this iconic British building from being destroyed.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This Byzantine Church was moved from Paris to Athens block by block.

The only ancient site that remains on the south bank of the sacred Ilissos river.

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

A Byzantine-era church hidden in a wooded area below the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

What looks like a normal building is really a hollow facade hiding a subway vent.

One of the oldest masonic museums in Paris.