Europe's official "zero-level," the equator of elevation.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

These wooden balconies that are both decorative and functional.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A Civil War Museum with some notable medical antiques.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

Exact replica of the ancient monument, but much, much lighter.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

An old dining hall now serves up ghost stories for lusty locals.

The home, museum, and death site of Kodak's influential founder.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

An antique cemetery in New York, this land is home to any number of famed corpses.

Alexander Milliner, a favorite of General Washington, is interred at Mt. Hope Cemetery along with 80 other Revolutionary War veterans.

Antique skeletons and taxidermy creatures were found crammed in a university closet.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

The only ancient owl carving found east of the Mississippi.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

A vast array of tropical plants collected by a vacationing couple.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.