The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

This cave holds a surprisingly colorful variety of geological oddities.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

An obelisk commemorating Lincoln's role in connecting the coasts.

One man's quest to save his town with a trail of record-breaking sculptures.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

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

One of America's first dinosaur parks gives a window into Depression-era paleontology.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The world's largest Holstein cow.

A winged-helmed, sword-brandishing tribute to German Americans.

A town honors its legacy of traditional American Indian pipe carving with one gigantic pipe.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

This sacred space and gathering spot for the Wyandot Nation has been the surrounded by controversy and confusion.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

A Mormon place of exile in Missouri.

This otherworldly church spire reaches up toward the heavens.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

One of the world's earliest skyscrapers.

The large rock formation where the Shawnee prophet Tenskwatawa stood and encouraged his warriors during the Battle of Tippecanoe.