This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

Settled in 1696, abandoned after the Revolutionary War.

One of the oldest living oak trees in the Southeast.

Dental instruments from the illustrious history of American dentistry.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

This abandoned cemetery has a dark past of bodies buried over bodies.

A medical facility that has been kept frozen in time.

This mysterious hill seems to pull objects uphill.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

One-layer pyramid in Indiana.

The lynching and burial site of America's first train robbers.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

There's nothing creepier than a cemetery next to a clown motel.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Gold Rush-era tombstones line the park's paths.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

Mysterious Spanish catacombs of unknown origins.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

The skeleton of a whale that beached itself in this Irish town is now on display in their public park.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.