One of Ayutthaya’s most iconic locations is a mysterious, hauntingly surreal miracle.

A battle between nature and architecture in the Cambodian jungle.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

This Cistercian monastery was the first in the German-speaking world

According to a local legend, this old castle could only be built after a woman was immured in the walls.

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

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

Yugoslavia's biggest underground airport lies in ruins.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This one-time health resort was used by aristocrats around the world.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

It's good luck to be mocked by this monkey.

Inspired by the Rialto Bridge in Venice, these three clustered bridges were just one part of a Slovenian architect’s grand vision.

A ruined castle stands atop a hill surrounded by dragon lore.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

This futuristic German television spire is actually the world's largest digital clock.

This "floating railway" is one of the world's oldest monorail systems.

This former steel and coal plant is now a neon-lit industrial fantasia.

The world's biggest pet store.

An industrial relic is now one of Europe's most staggering art spaces.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This monolithic slab of art metal crowns a German slag heap.