A war-torn Olympic relic is being overtaken by graffiti and nature.

A mocking tribute to the past and modern leadership of Prague.

Looming communist pillar with a Czech twist.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Berlin's old airport.

Op-art architecture designed for happiness.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Legends surround an ancient tree trunk riddled with nails for good luck.

The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Museum dedicated to the terror regimes of Hungary.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The prototype for all Nazi concentration camps.

Cold war icon and onetime "hole" in the iron curtain.

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

The land is home to swimming ponies and a legendary 18th-century treasure.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

A Texas museum filled with Broncos and Betties.