The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

A museum dedicated to the alleged Roswell Incident.

This replica of the Greek structure is in the heart of Nashville.

The world's longest known cave system.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

148 feet long and in the middle of a verdant forest.

A bizarre roadside attraction and the first instance of miniature golf in the world.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

A miniature city built by a single hunchbacked monk.

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

Home to items never before seen by the public.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The land is home to swimming ponies and a legendary 18th-century treasure.

The resting place of a Civil War celebrity's amputated limb.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

A museum dedicated exclusively to aircraft used in the military.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This old-fashioned carhop restaurant gave the world the waffle cone.

The maritime museum that boasts the largest nautical library in the western hemisphere.

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

Oldest unrestored plantation house in America that is open to the public.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.