The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

World's largest Christmas store.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A wall of chewing gum moonlights as collective art.

A Roman-style column in Oregon hides a spiral staircase inside.

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

Two massive rock outcroppings on the Oregon coastline.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A spiritual vortex among the red rocks in Sedona.

A Wild West jailhouse that slid down the mountainside.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Once a year, at exactly 11:11 a.m., this monument comes to life.