The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The remains of what was, not so long ago, the world's largest city.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Terrifying derelict military hospital once housed a recuperating Hitler.

An ancient stone fortress considered by many to be the eighth wonder of the world.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

A complex and beautiful system of rice terraces covers a million acres over the mountains.

A canvas of crops grow from vibrant red soil in this terraced farmland.

Large rock high in the mountains of Yunnan that is naturally shaped like a chair, complete with arms.

270 million year-old forest of stone.

Extraordinary rock formations in open Peruvian fields.

Island, once a pirate hideout, now home to an abandoned resort.

Nature took her revenge on the "Wickedest City in the World."

Roman ruins top white travertine terraces formed by ancient hot springs.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A Turkish ghost town abandoned in a population exchange with Greece.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

The remains of Crystal Palace Great Exhibition of 1851.

The ship that got left behind.

Mysterious and ancient carved standing stones.

These delicate ruins need more tourists to keep them from fading away.

Most-visited and most-photographed slot canyon in the American Southwest.

Known as the most dangerous bridge in the world, the Hussaini Hanging Bridge is only one of many precarious rope bridges in Northern Pakistan.

A centuries-old fortress city lies in ruin.