This ancient structure was built by a mysterious civilization that was largely destroyed by a volcanic eruption.

Psychedelic murals coat the inside of a nondescript research library.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

Diego Rivera's massive tiled fountain and failed infrastructure project.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Part bookstore, part café, and part forest.

The Devil’s own choice when he needs a drink in Brussels.

Christ's blood preserved in a Belgian town.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

Drink among marionettes at this pub inside a historic puppet theater.

Amsterdam's Red Light District leaves little to the imagination.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.