A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Native Americans built this circle of stones, which was used to predict astronomical events.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

A vertically floating hemlock controls the waves and weather at Crater Lake.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This work of art by Matthew Mazzotta resides in this park dedicated to the first black legislator in Idaho.

The largest outdoor art gallery in the Northwest United States.

Boise State's stadium was the first non-green football field in the world.

The first declared National Monument in the United States.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

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

A hotel with a rich Wild West history of miners and bootleggers.

A fascinating collection of art made from petrified wood and fossils by two octogenarian twin brothers.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

Cherokee alphabet, proof of ancient North American Jews, or just a hoax?

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.