Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Home of Howard Hughes' Spruce Goose.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The only road through the heart of Glacier National Park.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Two massive rock outcroppings on the Oregon coastline.

This downtown Dallas art installation is always on the lookout.

A monument celebrating the idea of reaching inaccessible places.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.