The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

This hand-carved wooden carousel in the Story City North Park was built in 1913.

The “American Gothic" artist's largest works hang in an Iowa State University library.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Piled high inside this warehouse and coffee shop are salvaged goods that span every corner of the globe.

Millions of dollars worth of sculpture decorate this Iowa city center.

This zombie-themed restaurant stands out in the heart of corn country.

Home with Gothic windows featured in a famous painting.

No one knows the origin of this small town’s unique name.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

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

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