A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An eerie, derelict amusement park in Berlin.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This amazingly preserved Gold Rush town is a historian's dream.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

Historic site where Native American hunters once trapped and killed buffalo.

Spectacular views await visitors to this lake.

A majestic hotel that also stands as a historic relic.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

The beloved war-time celebrity spent time in the area before retiring to the Edinburgh Zoo.

Scotland still bears an enormous scar of its Roman past.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

A fortified city, home to a remaining population of five families

Held in a fort that once stood for colonization of the area, this museum now tells the history of its indigenous people.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

The largest known meteorite on Earth was too big to move.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

The remains of diamond fever taken over by the desert.

A rustic place to spend the night, complete with amazing quiver trees and outsider art.

Known as "The People's Park," this verdant oasis is home to elephants and villagers alike.

A rare cluster of alien-like plants grows along a dusty highway.

Ten shipwreck-shaped chalets lie along the sand dunes on Namibia’s Skeleton Coast.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.