The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The first declared National Monument in the United States.

This Wyoming town is fascinated by a particular mythical creature.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

An experimental, automotive replica of Stonehenge.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

A Memphis park where you can walk the whole Mississippi River in one go.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This museum explores the lives of Chang and Eng, the "Original Siamese Twins."

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

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

A natural gas leak provides a flickering flame beneath a waterfall.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

This monument pays tribute to the city’s contribution to basketball history.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

A quaint village in Western New York named after Alexander Hamilton's beloved sister-in-law.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

This coastal port saw one of the most significant battles of the Civil War.