The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

An ancient Chinese temple where even the emperor dressed like a farmer in the name of the harvest.

A chinese farmer builds robots from scrap.

Why walk on this historical site when you can zoom down instead?

Perched atop an isolated 779-meter mountain peak, this enigmatic Cham ruin remains shrouded in mystery regarding its age and purpose.

Standing as a 12th-century architectural titan, this trio of brick structures boasts the tallest surviving Cham tower in Vietnam, reaching an impressive height of 38 meters.

The real faces of Venice beach captured on Romanesque columns.

Rainbow-hued local gem in Venice.

Salaguti's live-in museum: a fortress against criticism and consumer art.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A brother statue swap has adorned this building's facade for centuries.

This old fortification was converted to an "orphanage" in the 1940s, but now is a derelict and reputedly haunted ruin, resisting attempts to reuse it

A small Byzantine church lost in the middle of the mountains of southern Italy.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

Castle ruins of the not-so-chaste baronessa whose lovers mysteriously disappeared.

A striking ruined manor house in Norfolk, known for its picturesque setting and fascinating history.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.

How a bat poo mine became a major Native American archaeological site—and connections to legendary red-haired giants.

The largest cave on the island of Menorca was likely the site of Iron Age rites and rituals.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

One of Europe's best-preserved maritime quarantine stations, where thousands of travelers were once isolated to stop deadly epidemics.