Sandstone rock formations that look like they belong on the cover of a progressive rock album.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Over 100 million years ago, beach-bound dinosaurs left permanent marks on San Antonio's landscape.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

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

The Grand Canyon of Texas.

Home of an evil witch famous within southern folklore.

Enormous lake at the bottom of a unique cave system.

The cliff and rock formations are made out of Sioux Quartzite.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Just a man taking his prehistoric pet for a stroll.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A famous—but endangered—plant is on view at an unassuming nature preserve a quick drive from Myrtle Beach.

Granite outcropping that the state's tourism bureau doesn't promote because of its delicate ecosystem.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.