These unusual rooms on wheels are holdovers from the 1960s.

A former major munitions plant that has been converted into a sprawling art space.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

At 207 feet, one of the world's longest continuous escalators.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This lovely burial mound is actually a replica that was installed after archeologists excavated the original.

Outsider art meets paleontology at this roadside reptile repository.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

One of the last active volcanoes on the Eastern seaboard.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

America's post-nuclear-attack chambers of Congress.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

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

The record holder for the world’s largest peach.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.