This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

Ruins of an American Civil War iron forge still survive today.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This bridge is haunted by the ghost of a distraught mother.

Seller of surplus nuclear research materials.

This unassuming layer of clay boasts an out-of-this-world origin story.

On the edge of the Valles Caldera National Preserve, these rock formations create an eerie landscape.

For 60 years, skiers have calmed their nerves with cocktails hidden along these slopes.

This bird-shaped rock formation defies gravity, time, and classification.

The most powerful laboratory radiation source in the world pulses with 1,000 times the electricity of a lightning bolt.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

The U.S. Air Force has an anti-satellite laser weapon.

Some of the Old West's most notorious outlaws frequented this mining town.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

A blacklight journey through a celestial art exhibit.

More than 21,000 images fill this overlooked gem of a prehistoric site.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

This is one really big nut.