A six-ton wedding present for the King of the Scots.

The most loyal of little dogs, or a Victorian era publicity stunt?

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

Northern Ireland's Brobdingnagian stepping stones.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

Before Nixon, "watergate" meant canals.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

France's most famous cemetery, with some of its most curious tombs.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Britain’s longest ancient monument, this great 8th century earthwork was built to mark the boundary between what would become England and Wales.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This fantastical and eclectic English garden takes its inspiration from Egypt, China, the occult and more.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Some of England's last cave dwellers lived and worked within this huge cave.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.