A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.

This museum honors the first Spanish land grant in California which is still in the hands of the original owner's family.

Over one million bird-related artifacts await.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Potential high level nuclear waste storage site for the next 10,000 years and beyond.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

This graveyard is the eternal home of many brave pioneers who settled the Great Northwest.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

A short hike into the mountainside forest reveals a decaying 1890s town.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Bonsai trees that are up to a thousand years old.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

"The House That Love Built" is shying away from "The House That Ghosts Love."

Home of the "Father of Forestry."

Colorado Boulevard’s historic bookstore, operating since the bustling city of Pasadena was merely some orange groves and a few ostrich farms.

Pasadena’s Stonehenge.

An extensive collection of ancient Egyptian artifacts and mummies.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A hotel and restaurant serving as the mecca of kitsch.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A house built from trash known as the poor man's Hearst Castle.

The first safe in this California town had to hold all the gold.