This magical grotto is adorned with a complex pattern of native seashells, minerals, and fragments of colored glass.

Site of an escape, ten murders, and some scalpings.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

After Havre burned down, the best place to build was under the ashes.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

A massive playground in the woods of Germany.

A 12th-century church that houses a dark creature.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

This unassuming layer of clay boasts an out-of-this-world origin story.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

Setting this massive marionette aflame rids Santa Fe of doom and gloom for another year.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Across the islands, baked goods, sauces, and much more are for sale 24/7.

British troops and Prohibition couldn’t stop this spot from becoming one of the United States' oldest continuously-run taverns.

This small Japanese street is lined with figures, sculptures and a shrine dedicated to frogs.

A crumbling cliffside ruin hidden in the woods.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

This remote camping site offers incredible stargazing opportunities.