A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Mysterious stone tower featured in many alternative histories of the New World.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

This might just be the TARDIS of bookstores.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

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

This one-man homegrown eatery may be the world's most exclusive restaurant with its five-year waiting list.