A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

The mayor made the declaration in 2004.

Spectacular views await visitors to this lake.

The only road through the heart of Glacier National Park.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

A display of magnificent stained glass windows is the first exhibit of its kind.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

An adorably sweet display of sculpted Precious Moments figurines.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Giant granite rocks standing end-to-end like a train of circus elephants.

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

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This replica of the Greek structure is in the heart of Nashville.

The first declared National Monument in the United States.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

An alternate history park where the Union Army loses the war... to dinosaurs.

The fifth-longest natural arch in the world, and the longest outside China.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Home to items never before seen by the public.