Collection of vintage trailers double as hotel rooms.

What is the Thing?

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The walls of the iconic dome are hollow and have a secret stairway.

The United States Capitol's former columns still stand.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

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

The easiest way to the highest point in Wyoming is only accessible via one hefty fee.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

Miraculous tree that seems to sprout out of solid rock.

One of the smallest towns in the United States.

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

A house carved into a rock in the 1940s.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of the oldest living oak trees in the Southeast.

The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.