The highest point in Washington state is a volcano covered in glaciers.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This is one really big nut.

Home of the International Space Hall of Fame.

The world's tallest statue of an American hero.

Official museum, hall of fame, and repository of the Texas Rangers.

Crumbling hotel echoes with the sounds of the '30s.

A Texas museum filled with Broncos and Betties.

A modernist landscape of water and sci-fi concrete.

A monument to the center of the North American continent may be off by a few miles.

The first declared National Monument in the United States.

A cemetery housing wild west legends in South Dakota.

One man's quest to save his town with a trail of record-breaking sculptures.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

An enormous, inside-out glass globe built in 1935.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

The site of Paul Revere's historic two lantern warning.

A 60-room castle constructed by a horse-racing heir.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.