A beautiful but toxic fountain of mercury.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The world's only museum devoted to the wonders of fluorescence.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

A memorial to 350 people burned at the stake for witchcraft.

Less a museum than a bizarre fantasy world created by artists and engineers.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.