The largest flower auction house in the world.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

The world's first interactive human body museum also serves as a chair for a giant orange man.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

This concrete residential area doubles as an open-air gallery.

One of the world's heaviest musical instruments towers within a popular urban park.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A kaleidoscopic warehouse-maze of handmade neon signs.

A monument to the man who almost killed Hitler.

Puppet theater and museum holding a collection of more than 300.

When German-Iraqi relations broke down, this embassy was vacated post haste.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Architectural monsters are devouring this palace's every door and window.

The glowing blue Nymphaeum of Emperor Tiberius.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Geothermal waterfalls in Tuscany.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.