The final resting place of one of Thomas Jefferson's formerly enslaved sons.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A mysterious spirit totem at the edge of Navajo lands.

This historic national park is covered in the stunning ruins of red rock pueblos.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

When ecosystems collide in the arid Southwest.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

This ghost town was once a cult-like religious utopian settlement.

A house carved into a rock in the 1940s.

A ghost town that held steady longer than most, but finally gave up the ghost.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Even in death, he's still your huckleberry.