Erosion and time have created a naturally-formed water park.

Curious cave that stays a cool 56 degrees all year long.

Giant granite rocks standing end-to-end like a train of circus elephants.

European castle ruins in an American state park are actually the product of death and grief.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This Costa Rican chapel is the most metal church in the world, literally.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Community bookshelf of 25-foot-tall book spines.