This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Baroque celebration of the end of the Great Plague of Vienna.

1513 Turkish world map, full of European state secrets and snarky commentary.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Museum dedicated to the terror regimes of Hungary.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

Romania's triumphal arch looks out over Bucharest.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

Packed to the ceiling with antique taxidermy and hunting arms.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

An underground city of salt.

The second largest reclining Buddha in the world got "lost" for over 120 years.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A fantastic assortment of China's finest and most disturbing wares.

An ancient iron pillar in Delhi that seems to be rustproof.

A natural arch offers panoramic views of Yangshuo's karst hills.

Sacred Buddhist home of some spiritual monkeys.

This Himalayan airport provides one of the most difficult landings in the world.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

Dozens of padlock-trees along the Moscow River.