A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A hidden beach at the end of a tunnel of mangrove trees.

Railroad came. People came. Railroad left. Town died.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

Walk in the footsteps of the gods and straddle two tectonic plates.

The loneliest island in New York.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

One of the ghostly stops along Route 66.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Friction between grains of sand cause a curious "singing" sound.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Travelers exchange letters with woodland creatures at this mini post office.

Surreal riveted sea forts once protected the Kent shores from German attack.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.