A priceless collection of the Nation's cryptologic history.

An out-of-the-way state park in Oregon that features both a picturesque waterfall and the ruins of a hydropower plant.

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

Home of Howard Hughes' Spruce Goose.

Formerly secret, precariously perched boulders.

Massive crater in central Oregon.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This monument claims to display the first pot used to cook a famed Southern stew.

A fascinating aviation museum where you can chat with the veterans who once flew the aircraft on display.

A vast collection of rare, historical, and vintage supercomputers.

A white oak with property rights.

A collection of massive stacked rocks in Texas includes a snarky note on the benefits of modern technology.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

No one really knows how these old hobby horses got here, but the herd keeps growing.

A garden full of metal sculptures that celebrate the double bass.

A mapping error in the 19th century made loggers think this section of the forest was underwater.

This massive roadside mascot was the first version of the giant to illustrate his butt.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

This Stonehenge-inspired solar calendar stands alongside a landfill, in the middle of the Nevada desert.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

The farthest you can be in the contiguous U.S. from a McDonald's location.