One of the highest points in Bexar county offers birdseye views of San Antonio and a four-story stone tower.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

The oldest active mini golf course in the U.S. has an elegant Art Deco style filled with lush tropical plants.

The quirky gift from West Berlin for the 1968 World's Fair still stands in Hemisfair Park.

A 2,500-pound wooden nickel makes this woodworking museum easy to spot from the road.

A 131-year-old wunderkammer of Texas history.

A taste of Middle Earth, in the middle of the Bayou City.

The longest living non-clonal organisms on Earth.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

Natural rock water slides hidden in the remote forests of northern Idaho.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

The only road through the heart of Glacier National Park.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

A black cottonwood gets a second life as a home for books.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Home to the deepest rift anywhere on Earth.

Curious rock formations in a tiny Kansas state park.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

A fitting attraction for the corn capital of the world.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.