Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

When this test site was abandoned, they didn't even bother to take the rocket with them.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Try a classic Necco candy bar being resurrected in a small suburban shop.

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

Nothing says indulgence like a 1,500-pound chocolate castle.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Once the home of a hermetic monk, this cave now houses a small church.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This shop for all your super spy needs hides an educational secret.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A museum dedicated to the history and exploration of both popular music and science fiction.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An alchemist's "magic door" stands in the middle of a Roman park.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.