This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

Underground tunnels remain beneath this abandoned mental asylum.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

This small-town pizzeria won the Hollywood lottery.

Ruins of a historic medical facility sits eerily by the water.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

The kind of mixed-up place that drives archaeologists crazy.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The Vermont square that inspired Shirley Jackson's "The Lottery."

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

Why have you never heard of the second most popular tourist site in New York?

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

The birthplace of the alleged inventor of baseball.

A 13,000-year-old mastodon skeleton was found during the construction of a 19th-century New York mill.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

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