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

Home to the deepest rift anywhere on Earth.

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

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

This giant green head remembers one of America's jazz giants.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

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

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

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

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

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

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

Metal sculpture folk art lining the Kansas Highway.

A statue high in a hill that represents how Buffalo Bill got his name.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Curious rock formations in a tiny Kansas state park.

The house where the pulp fiction writer and Conan the Barbarian creator lived.

The world's tallest statue of an American hero.

Official museum, hall of fame, and repository of the Texas Rangers.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

The Grand Canyon of Texas.