Crystal hunters can dig for their own stones at this DIY mine in Arkansas’ quartz belt.

One of the largest private collections of fossils in the world.

George Washington, Alexander Hamilton, and Benjamin Franklin all slept at this humble inn.

In the Ozarks, a waterfall shoots out from a glorious hole.

What if the cure for all that ails you was as simple as repeated exposure to low-dose radon?

A small shop filled with history, mystery, folklore, and more.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The oldest city park in Walla Walla is home to hundreds of birds, from wood ducks to white peacocks.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

Half of a waterfall goes into the river while the other half seems to disappear.

This large midwestern cavern features impressive rock formations and an underground waterfall.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

A short tunnel built straight through a magmatic dike.

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

A lava tube cooled to form this long tunnel that stays chilly even at the height of summer.

Dedicated to extinct passenger pigeons.

A 20-foot-tall quarter commemorates George Washington’s ties to Bedford County.

How did a 154-foot-long piece of spacecraft wind up abandoned along the side of a Florida road?

Overshadowed by the theme park opposite it, this small museum explores a major moment in American history.

This small museum inside a larger sports complex honors the first Native American to win an Olympic gold medal for the U.S., and his life of achievement and struggle.

A short interpretive trail about one of the first human cultures in North America.

A series of silhouettes that recall the great cattle drives of the 19th-century.

This 19th-century house museum features a horse-drawn hearse and other antique oddities.

This small canyon park was once the main street of Silver City—until a flood washed it away.