An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

White llama terraces dazzle in Peru's "other Machu Picchu."

Remains of a Greek freighter trapped off of Rocky Point in 1961.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Yugoslavia's biggest underground airport lies in ruins.

A valley of unique erosion patterns lends to a view like nothing on Earth.

Astronomical observatory above Lake Titicaca.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

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 pyramid in Central Europe of unknown origin.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Ruins of the laboratory where a mysterious doctor invented an embalming fluid and stored his mummies.

The bomb-ravaged remains of of a colossal Neptune.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

Underground monastery and fortress.

A failed Russian themed village and amusement park in Niigata prefecture.

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

Gutted airplanes slowly decay in a Florida field.

Virgil's many-mouthed gateway to the underworld.

The ship that got left behind.

This ruined Japanese stripclub sits half burnt to the ground.