Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

This abandoned nitrate town was repurposed as a dictator's prison.

Formerly a brutal Nazi colony, this Chilean village was remade as a (controversial) German-themed tourist trap.

Walk on a glass floor suspended over ancient mummified remains.

This historic Chilean cemetery is the burial place of hundreds of European and American freethinkers and non-Catholics.

The ruins of a grand theater destroyed during the most powerful seismic catastrophe ever recorded.

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

You can swim in these highly salty, mesmerizingly blue lakes in the Atacama Desert.

This enchanting rainforest hotel looks as though it grew from the forest itself.

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

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.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Pompeii's less famous neighbor is still revealing her secrets.

The walls and streets of the ancient city are peppered with penises.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A limestone grotto where daylight filters in from below and turns the water a beautiful turquoise. Also home to a small underwater nativity scene.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The middle finger of modernity.

A 16th-century horror show built in a lovely Italian garden.