Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

Take a dip in the world's largest mineral hot springs pool.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Abandoned silver mine strewn with wrecked and twisted structures.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Portlandia is the second-largest copper repoussé statue in the United States.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

A massive sea stack famous for its appearance in The Goonies.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

The world's tallest statue of an American hero.

The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

The Grand Canyon of Texas.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The prototype for all Nazi concentration camps.

A Christian monastery stands on what was once a holy Incan temple.

It took 82 years and four different plaques to finally get the story right.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

An Inca spa, military outpost or maybe… both?

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.