This belfry is all that remains of the town that was buried by a violent volcano eruption.

The 20-mile causeway that separates the Netherlands from the sea.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

This French colonial post office is arguably the grandest in all of Southeast Asia.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This abandoned five-star hotel is now a five-star urban exploration destination.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The embalmed remains of the communist leader lie within a custom crystal coffin.

Follow the original medieval paths that wind through this intriguing section of the city.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

This Taiwanese promontory is covered in otherworldly hoodoo formations.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

This unique building in the main square stands out among the city's typically Baroque architecture.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Thousands of flowers create enchanting pink tunnels over the city streets.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.