This small museum is dedicated to the study of coprolites, or fossilized poop.

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

This balancing rock is one of Utah's most unusual geological formations.

The location where the iconic movie character declared it was time to go home.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

Wisconsin's most celebrated export gets the royal treatment on I-94.

A 25,000-square-foot display with dozens of model trains in intricate miniature worlds.

This restaurant proudly displays bread signed by the 39th president.

The only 'battle' in the Toledo War between Michigan and Ohio set the stage for a persistent state rivalry.

Pay your respects at the final resting place of the man behind one of the best-known names in food.

One of Detroit's most iconic fictional protectors, RoboCop, finally has a statue.

Where the Model T was made and the assembly line was invented.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

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

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

Ancient human remains unearthed around the iconic monument.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.