Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

This little-used trail winds through the highest mountain range in central Nevada with sections around 10,000 feet.

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

The only road through the heart of Glacier National Park.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

Over 600 acres of idyllic open grassland honor Nebraska’s georgic storyteller.

Home to the deepest rift anywhere on Earth.

The site of a minor battle might have been forgotten if not for one participant’s famous family and the death of a respected warrior.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

Two creeks flow out of either end of this canyon in opposite directions.

A river runs through this remote valley in a very unexpected way.

This interpretive path lets you get up close and personal with dinosaur bones.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This spectacular track has run continuously since 1882.

The highest bridge in America was built for an almost unnervingly small amount of money.

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

This 18-foot-tall steel lotus is a meditation on ecological crisis that originally appeared at Burning Man.