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

Enormous lake at the bottom of a unique cave system.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Home with Gothic windows featured in a famous painting.

A unique attraction and museum dedicated to exploring iconic roadside structures.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

The world's tallest statue of an American hero.

Home to Hollywood history and a very special salt crystal.

Cannon designed to fire an atomic warhead.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Display that gathers the basic elements of the universe in one convenient location.

A bizarre roadside attraction and the first instance of miniature golf in the world.

More than five miles of underground passageways.

What better place to take a seat?

An amazing collection of scale model ships.

A strange history museum, with items accumulated by a pair of globe trotting spies.

One of the few surviving "Wigwam"-themed motels.

Colorful collection of antique musical oddities.

A mysterious find dredged from Louisiana waters.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

Community bookshelf of 25-foot-tall book spines.

A museum celebrating the Victorian obsession with hair art.

A miniature city built by a single hunchbacked monk.

Park filled with machinery that drove the southern agriculture and oil industries forward.