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

Miraculous tree that seems to sprout out of solid rock.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This erect, phallic geological spire wasn't always named so domestically.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Roaming bison and a spectacular view at the highest point in Nebraska.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

The world's largest collection of the world's largest objects is in one small Illinois town.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

Massive still life just off the highway in Kansas.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A statue high in a hill that represents how Buffalo Bill got his name.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

This memorial in the Adirondack wilderness honors the accidental death of a Scottish entrepreneur.

An ancient glacial pothole waterfall in the heart of the Green Mountains.

The Vermont grave of a 4,000-year-old mummy prince.

Dispersed across 45-acres, 39 structures house a massive collection celebrating American Folk Art.

In order to save this beloved rock, locals blew it up and put it back together piece by piece.

This massive boulder is inscribed with the story of a sensational hostage negotiation dating back to Colonial times.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.