Elevated freight railway turned wildly successful urban park.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A haunted hill that supposedly defied gravity.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Large Hadron Collider and the Birthplace of World Wide Web.

A gigantic 10-foot tall stone man.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Bizarre Cavern.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

What is the Thing?

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

Robots, lasers, and whoopee cushions, oh my!

This replica of the Greek structure is in the heart of Nashville.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This quirky curiosity shop takes its cues from the world's bazaars.

Former hotel turned into haunted playground.

An auroral research program that superheats the ionosphere.

A toxic ghost town sitting atop a massive coal fire.

The largest hewn stone in history.

A museum dedicated to the alleged Roswell Incident.

The vast, legendary catacombs hold secrets much stranger than stacked bones.