In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

A self-built castle made by a mysterious man.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Limestone caves with spectacular showcase chambers.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The cinder cone volcano with a less than complimentary name.