Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A 16th-century Andalusian palace.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

The largest hewn stone in history.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

Ruins of a German Castle on top of a towering stone pillar.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.