The remains of an encyclopedic sculpture garden later used as an internment camp.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

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

Erotic art covers the walls of the largest ancient pleasure palace.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A sulfuric hellscape in southern Italy.

A submerged archeological park still holds the wonders of a Roman Sodom.