The only castle in North America to ever house European sovereigns.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A pair of connected skyscrapers form this symbolic gateway.

Once a beautiful palace, this structure is now known as the ''museum of destruction."

This fresco inside a Serbian cave church has been a source of disagreement.

A Roman monument to their own civil engineering prowess.