Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

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.

Tiny memorials honor individual victims of the Holocaust.

A restaurant and observation deck built in a unique broadcasting antenna.

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.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A tiny church on a man-made island in the Adriatic.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

An ancient knight and a symbol of the city's freedom.

This peaceful park with centuries of history hides in an overlooked section of South London.

An architectural oddity hides in plain sight on this iconic London bridge.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The taxidermied remains of a once-great parrot.

The last four extravagant street signs of London's historic banking street.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This one has sailed five times as far as Sir Francis Drake's famous ship.

This luxury shopping lane has been protected by its own tiny police force for over a century.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.