The celebrated eyesore created by starry-eyed sweethearts.

A public urinal so pretty, it was declared a national monument.

A floating cat sanctuary on an Amsterdam canal.

Century-old shop, specializing in Occult products.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

A daily replay of the experiment that proved the rotation of the Earth.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

The first American axe throwing club.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

Dr Barnes' $25 billion private collection of art and arboretum.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

Where once there was a train station bathroom, there is now this German burger joint.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The prototype for all Nazi concentration camps.

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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