This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Mine your own precious stones.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

An abandoned Depression-era zoo hidden just off the highway.

Massive prehistoric mammals used these stones as oversized scratching posts.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

These otherworldly limestone formations jut out from the Kansas prairie.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

A crack flared at the base provides a pathway completely through a sandstone ridge near Moab.

It's safe—and permitted—to walk across these twin natural sandstone arches.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

Rich red almandine gemstones are waiting inside the volcanic rock strewn across this eastern Nevada hillside.

This dry lake bed contains the oldest known petroglyphs in North America.