Museum about life, death, and cannibalism in the Stone Age.

"The Most Wonderful Wonder that ever appeared to the Wonder of the British Nation."

Europe's largest prehistoric mound – burial site of a legendary king?

Enter the world under the hill at this ancient UK burial chamber.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

This Shetland Islands bus shelter may be small, but it squeezes in a couch, a desk, some art, and even an old telly.

A remarkably well preserved tower dating all the way back to the Iron Age.

This replica of an 8th century burial ship actually sailed to Norway before returning home to Minnesota.

A fascinating little museum all about the rich history of Peru’s famous plant.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

Steepest flood safety railway in the entire world.

The miraculous hydrant that saved the Mission District in 1906.

A marvel of Byzantine engineering under the streets of Istanbul.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

A tree that defies gravity grows in an ancient ruin.

This piece of Australian modern art is part joke and part history.

A mocking tribute to the past and modern leadership of Prague.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Church organ in the Philippines constructed out of bamboo.