A legendary boxing venue and ring featured in Rocky V.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

The grounds and buildings of an old wood pulp mill have been transformed into an innovative art park and museum.

King Carlos IV laid the first stone during construction of this chapel.

The ceiling of this cavern is dripping with multicolored marble stalactites.

Harder layers in colorful sandstone weather out as prominent “fins" and even more intricate and bizarre shapes.

This is not your typical jungle gym.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A wartime promise becomes a shrine to Our Lady of Lourdes.

This California artist's front yard acts as a gallery for his unique, scrap metal animal sculptures.

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

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

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

The famous artist couple lived and worked here, in two different houses separated by a bridge.

The first American department store, and home to the largest operating musical instrument in the world.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.