Home to items never before seen by the public.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

An overlooked memorial honoring the local Washington residents who died in World War I.

The 28,000-year-old specimen is remarkably intact.

This giant mimetic milk bottle has encouraged Route 66 travelers to choose dairy since 1948.

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

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

Deep into the lower floors of Pike Place, find a date with fowl fate.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

A town pays homage to its namesake.

Electrical pylon in the shape of Disney's beloved mouse.

An exotic wildlife habitat right off The Strip.

This building contains handprints that are well over a century old.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

An abandoned town is hidden in Great Smoky Mountains National Park.

The world's longest known cave system.

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

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

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

This rustic old building is said to be the most photographed barn in America.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.