The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Eulogizing an unknown man's unusual demise.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

The unusual lighthouse looms over waves of prairies with no sea in sight.

Ancient structures used to make and preserve ice in the deserts of Persia.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

Abandoned mini-mansions that were once intended for affluent Bangkok families now sit empty.

This stack of stones honors a murdered 18th-century woman.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

The hollow trunk of this 650-year-old tree was used as a hideout by two Jewish brothers during World War II.

At this California chicken ranch, four bucks will get you 18 eggs and a chorus of dancing animatronic poultry.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

A magical oasis in the middle of the Negev Desert.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

You can row a boat through this ancient underground reservoir.