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

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.

Op-art architecture designed for happiness.

Apartment complexes built into huge repurposed natural gas tanks.

The resting place for anonymous victims of the Danube's dark waters.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

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

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

Looming communist pillar with a Czech twist.

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

Macabre astrological automaton clock dating to the late 1400s.

This modest marker near Notre Dame identifies the very center of Paris.