The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This vestige of Seychelles’s colonial past now resides in a busy intersection and didn’t chime for its first 96 years.

A British general, a suggestive tree, a map of paradise.

This concrete church spent a period of its history as a World War II bunker.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

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

The world's biggest pet store.

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

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

No need to strap in for a "ride" on this walkable roller coaster.

The monumental home of Prussia’s eccentric "Cannon King."