Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

Home to Hollywood history and a very special salt crystal.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

The highest point in South Carolina was once owned by an energy company that neglected it but now the state is taking it back.

The summit Roosevelt conquered before he descended to become The Chief.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

For decades, the largest tungsten producer in the U.S. was located in a spectacular setting in the high Sierra Nevada, with some of the workings over 11,000 feet.

A small research station sits at the summit of this mountain, which is one of the few U.S. peaks higher than 14,000 feet outside of the Sierra Nevada.

Discovered by a soldier during the Revolutionary War, these springs helped create an iconic South Carolina ginger ale.

The century-old remains of an abandoned farm town in eastern Washington.

A roadway designed for a visiting monarch.

The fifth-longest natural arch in the world, and the longest outside China.

Unlike most arches, this geological oddity formed in a volcanic dike.

A long-forgotten Victorian swimming hole is still a fun spot for a dip.

These massive concrete balls were used to mine gold in Virginia.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Wood carving meets bird conservation at this museum showcasing the life's work of one man.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This abandoned limestone quarry now provides visitors with multiple, breathtaking viewpoints.

The largest tidal whirlpool in the Western Hemisphere.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Expertly restored pinball machines as far as the eye can see.

After the state would not recreate this beloved rock formation, three New Hampshire brothers took things into their own hands.