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

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

Yo, Adrian!

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The world’s first penitentiary, meant to be humane, drove men insane.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The oldest surviving botanic garden in the United States.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

One of downtown Berlin's last reminders of its Communist past.

A surreal museum of extraordinary industrial objects.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

The first museum in the world devoted to sexual gadgetry.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

When the rain falls, this drain system turns into a musical instrument.

A fascinating insight into daily life in the Eastern Bloc.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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