This wooded grove of beautiful hand-built stone grottos is a hidden gem within a shuttered Franciscan monastery.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

This abandoned prison castle has become an imposing gallery of graffiti art.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

One of few surviving standpipe water towers in the U.S.

University City's quirkiest resident lives in a park named after its first.

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

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

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

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

This simple stone monument honors a 19th-century tragedy.

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

America's smallest town is run by its single citizen/mayor/librarian/bartender.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Another in a long tradition of legends regarding infernal seats.

Four ionic columns from the Treasury Department building ended up in a park in Nebraska.

A Winnebago Tribe collection featuring arrowheads, artwork, and a mysterious rock carving.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Roaming bison and a spectacular view at the highest point in Nebraska.

Storage units with a wartime past.

A eclectic collection of military memorabilia.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.