This historic museum is home to a rare Confederate Chester Gun.

The only free-standing, vertical sundial in the US was keeping standard time before it was even invented.

Dental instruments from the illustrious history of American dentistry.

An old train trestle re-imagined as an Egyptian obelisk.

One of the oldest living oak trees in the Southeast.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

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.