Oldest building in California still in use.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Megachurch turned Catholic church comprised of 10,000 glass panes.

The famous animator's private station house and man-cave was the birthplace of imagineering.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A historic freight system that found the true gold rush is in tourism.

This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

This largely forgotten piece of Cold War history stands hidden in the woods just north of the Mississippi Gulf Coast.

The state's oldest continuously operating museum houses more than 5,000 Civil War artifacts.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

Visit the monolithic tomb of America's most famous general.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

This private residence was the template for one of the most beloved television homes of all time.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.