This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

Limestone caves with spectacular showcase chambers.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An incredible garden taking over the interior of a massive sinkhole.

"Would you like your sangria in an IV bag, or straight-up?"

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

One of the first big sculptures anywhere in Australia.

The only pollutant in the clear blue water is sunscreen.

A giant Australian fruit and tropical farm.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Three-story concrete ram with a permanent gift shop.

"The Wonder From Down Under," a worm shaped museum celebrating the endangered Giant Gippsland earthworm.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

A clear example of the process of erosion in action.

A micronation of epic proportions.

A massive metal lobster welcomes tourists to a roadside restaurant.

Clusters of huge boulders in the Australian Outback.

Alien rock formations grown from the sands of an Australian national park.

An opal mining town in the middle of Australia where people live, worship, and shop underground.