Dr Barnes' $25 billion private collection of art and arboretum.

The Ryerss mansion in Burholme Park now houses a community library and a museum filled with a trove of oddities from around the world.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

One man's lifelong obsession with death.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

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

A man used his Civil War-era fortune to build this sanctuary in memory of his wife.

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

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

One of the world's oldest continually operating bookstores.

A former plant in one of the hubs of U.S. steelmaking has been turned into this museum celebrating the history of American industry.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

One of the world's largest model railroads is a mind-boggling achievement.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A unique sculpture park that specializes in the huge and bizarre.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.