Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

This 700-year-old street food market features baby octopus and soy donuts.

Peace Park and the Atomic Bomb Dome.

This Bangkok high-rise looks like a rudimentary LEGO elephant.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A former reservoir that was only recently discovered after more than 60 years of disuse.

This jam-packed Singapore antique museum preserves the fading remnants of a uniquely mixed culture.

This rare wildlife haven in Singapore feels like you're in the tropical rainforest.

The oldest museum in Borneo is a cornucopia of rare taxidermy and human skulls.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

The seaside ruins of an ancient salt production facility.

This tall stone wall with no door and ill-matched windows was built centuries ago, and used as a shelter for domesticated pigeons.

A museum dedicated to Wales’ favorite—and strangest-looking—watercraft.

According to legend, King Arthur killed a beast that dwelled beneath the waters of this Welsh lake.

A modest stone circle in North Wales.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.

The largest known medieval map of the world.

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

The collection is exhibited in a Staten Island building modeled on traditional Himalayan architecture.

An aptly-named street near the birthplace of the modern LGBT rights movement.