An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The location where the American Revolution ended.

An eponymous directional signpost erected by the first president of the United States.

Outsider art meets paleontology at this roadside reptile repository.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

This museum explores the grim reality of life in the earliest British colonies in America.

This old-fashioned carhop restaurant gave the world the waffle cone.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

Less a museum than a bizarre fantasy world created by artists and engineers.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.