A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

One man spent 10 years building a spectacular section of road because no one else would.

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

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

These mysterious ruins are hidden amid this sleepy coastal city.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

One of only two pod-shaped homes designed by Frank Lloyd Wright.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

This small hut in the middle of a parking lot was once the wooded sanctuary of the 'Hermit of Montrose.'

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

This abandoned bridge is now a favorite haunt for graffiti artists.

The world's oldest and largest museum of mass transit vehicles.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

This impressive midden of scallop shells apparently all comes from a single fishing company.

Although it appears much older, this castle-like tower is actually a Georgian-era folly.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

A mysterious, weather-beaten bus lies on the coast of Harris, enticing the curious to investigate.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

Legends surrounding this megalithic tomb range from giants to a dwarf named Trollid.

This astronomically-aligned stone circle was the first of its kind to be built in Great Britain after a 3,000-year hiatus.

FIFA deemed this isolated field one of the most remarkable places to play the sport.