This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The ghost town that ended up on Ebay.

Ancient pueblos built into the base of a natural canyon wall.

A beautiful riverside mansion where the intellectual life of early-20th-century Argentina flourished.

A peculiar forest that was handcrafted for government experiments.

Everything good comes from Uranus

Vintage neon signs illuminate highway history.

This centuries-old graveyard is the final resting place of the Fort Fisher Hermit.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

This mysterious marker puzzles pedestrians and infuriates geographers.

Unusual finds in this shrine to local law enforcement include a 19th-century vampire-slaying kit.

The oldest candy store in England has been selling traditional sweets since 1827.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

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

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

Everything from miniature biblical scenes to life-sized statues are almond-based at this sweet and nutty gallery.

The scarce remains of a sunken ship peek out from the sand on East Beach.

One of the most popular attractions in the small resort town of Kabardinka.