This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

The best place for scenic views of the DMZ and North Korea.

A large visitor's complex and place of remembrance on the outskirts of the DMZ.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

Stretching almost 2,000 feet, this painting is one of the longest pieces of Buddhist artwork in the world.

These excavated burials from the Tarim Basin are wrapped in mystery.

The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.

The western-most fortress on the Great Wall of China has gone from a strategic stronghold to a kitschy tourist carnival.

These layered sandstone mountains in China look like they are made of pressed crayons.

Monks turned this mountain into a temple by digging grottoes, tunnels, and a huge pagoda-like hall.

This bridge was constructed from the rubble of the infamous Bastille.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

The place where World War I began.

A curious cave church carved into the face of a cliff.

Gargoyle head that brings good luck.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

The tangled roots of a giant banyan tree have fully reclaimed the ruins of this abandoned warehouse.

Vietnam's largest Buddha statue depicts a female sage.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

Twelve sweet, nutty, life-sized statues are housed in this second-story shrine to almond paste.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.