An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Continuing the tradition of the dime museum in style.

One part antique store, one part curiosities hodge-podge.

DIY collection of eclectic holdings.

Site of a former hidden treehouse in New Orleans.

Walk the whole Mississippi River!

An unknown Hall of Fame in Jackson, Tennessee.

The world's longest known cave system.

Enormous lake at the bottom of a unique cave system.

Cadillac where country's first big star was found dead.

Stunning wetlands ablaze with pink lotus flowers.

Bizarre Hindu and Buddhist sculpture park.

Hoax, mistake, or evidence of dinosaurs in human times?

Surat Thani's official flower—and the world's largest—smells of rotting meat.

This floating cinema brings new meaning to the phrase "going out" to the movies.

The cursed island of black pebbles.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Centuries-old bridges grown from tangled roots.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

A forest of phallic offerings found in a quiet corner of a hotel car park.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.