Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

This erect, phallic geological spire wasn't always named so domestically.

A small burial plot formerly stranded in the middle of a road.

This seemingly charming home memorializes and honors the victims of a century-old unsolved murder.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

The mounds at this site were reconstructed with the help of archaeologists and historians.

The failure of one component toppled this entire bridge during rush hour.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

Solving a 60-year mystery finally gave a name to the young woman known only by the color of her clothes.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

The largest ancient burial mound in Ohio.

Deep scars on the earth left by the Ice Age.

The largest earthwork effigy in the world.

Paranormal activity on the great lakes.

A remote hill on a stretch of country road where the laws of physics are defied... or so it seems.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

This shallow cave got its name from copious amount of human bones found inside.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

Population: 1.

Native Americans built this circle of stones, which was used to predict astronomical events.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The first declared National Monument in the United States.

This landmark is a central figure in the Nez Perce origin story.