One of the American Southwest's most extensive collections of Navajo rock art.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A clear blue swimming hole with hidden caves, still unexplored.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.

This ghost town in Belgium will lose its street art when it ceases to exist.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Most prolific publishing house in the 1600s open to the public.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.