This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The sign at the garden gate reads: "These Plants Can Kill."

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

Stroll through a wonderland of stupendous moss-covered trees.

A technicolor place of worship for Elevationists.

Hot springs monkey spa in the middle of Hell's Valley.

Enormous lake at the bottom of a unique cave system.

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

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

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

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

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

These fantastically named natural pools look like something out of a Scottish myth.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."