This once-derelict building is now one of the most beautiful bookstores in the world.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A beautiful but toxic fountain of mercury.

This Funeral Hearse Museum represents the finest in cadaver transportation.

Local lore says a serpent-like beast lurks in the deep basin below the falls.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

This tiny movie theater was the last one in the U.S. constructed in the Nuevo Deco architectural style.

This modern labyrinth lies in the shadow of a ruined medieval castle.

This elaborate towering structure was once famed for its revolutionary height.

Huge masonic hall in Philadelphia with lavishly themed rooms.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

Geodesic dome luxury retreat in the Scottish Highlands.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A charming Spanish village sits atop this natural limestone overpass.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A secluded natural oasis hidden deep along a rainforest trail.

A tiny collection of traditional Japanese woodblock prints, open only when the owner feels like it.

A hotel and restaurant serving as the mecca of kitsch.

This mesmerizingly colorful pond looks like a scene straight out of a fairytale.

An architect transformed this abandoned cement factory into his castle-like workshop.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.