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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

Don't be a grizzly man. Get personal with Alaska's wild bears from the safety of this conservationist camp.

A sacred Ojibwe site covered in pictographs next to Lake Superior.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The unusual medical inventions of the man who gave the world Corn Flakes.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

A building so large that it has its own weather.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Dubbed the "smallest church in America," this tiny sanctuary was a local grocer's dream come true.

One of the oldest living oak trees in the Southeast.

The oddly shaped, steam-spewing building is now an art studio and gallery.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

This ever-changing arrangement of naked dolls even caught the attention of "The Walking Dead" crew.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

FDR hoped to find a cure for polio in this Georgia town's warm springs.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

HFH's slum simulation is either a noble recreation of poverty or a cringeworthy attempt at same.