A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

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

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

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

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

Largest man-made excavation on earth!

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

The world's largest military aircraft cemetery.

Dramatic river bend surrounds a natural red-rocked pedestal.

Not your typical pet cemetery.

The last SR-71 ever constructed.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A museum has some wedding cake dating to the Teddy Roosevelt administration, and some bacon from FDR's.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.