A museum of unusual collections, mini-towns, and a half-dog, half-alligator.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

Site of a former hidden treehouse in New Orleans.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

Moonbows over Kentucky.

The world's longest known cave system.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

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

Home to Hollywood history and a very special salt crystal.

The longest navigable underground river in the United States is home to countless blind and albino animals.

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

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A speakeasy takes on Chicago's drinking culture.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A wild west land agreement was etched right onto this historic Idaho stone.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

Home to the deepest rift anywhere on Earth.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Once home to over 8,000 exiled Hawaiians suffering from Hansen's Disease.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A true treehouse near Hawai'i Volcanoes National Park.