A collection of beautiful crystals shaped like freshly plucked roses.

The largest land animal skull ever discovered.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

Curious rock formations in a tiny Kansas state park.

Home to fossils and other specimens from the Western Interior Seaway.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

This small museum contains fossils from an era when Kansas was underwater.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

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

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

The cliff and rock formations are made out of Sioux Quartzite.

Half of a waterfall goes into the river while the other half seems to disappear.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A museum within a museum, devoted to history's most questionable medical devices.

This large midwestern cavern features impressive rock formations and an underground waterfall.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

The oldest university museum west of the Mississippi retains its 19th century feel.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

The only diamond mine in the world where you can keep what you find.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

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.

These pink granite water slides are the result of millions of years of erosion.