This iconic hilltop church doubled as a lighthouse in the 19th century, guiding ships into the port of Valparaíso.

A wooden dock art installation on Chiloé Island taps into the island's indigenous mythology.

Named for the DeFoe novel inspired by a stranded sailor, this island is known for its rare plants and extreme beauty.

The ominously named cave is home to some remarkable ancient art.

A fantastical and futuristic temple of light built from nine monumental glass veils.

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

This was once the center of the Birdman cult, and is now a World Heritage Site.

A record-breaking pool that uses computers to turn ocean water into cleaner, private swimming water.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

A beautiful deserted greenhouse in the middle of a park.

One of Chile's most active volcanoes is riddled with beautiful caves.

A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.

What was once a unique system of urban elevators is turning into a mechanical ruin.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.