A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Enormous lake at the bottom of a unique cave system.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

Marie told fortunes from her small stand on the Boardwalk for decades, including to a young Bruce Springsteen who would busk outside her booth.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

A headstone tells the sad story of a lost little boy and his pet dog.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The strip club's VIP lounge is actually a rare repurposed Futuro House.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

A simple Colonial home with a past haunted by death and madness.

A relic from a forgotten bakery chain still spins atop a diner.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.