An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Alexander Milliner, a favorite of General Washington, is interred at Mt. Hope Cemetery along with 80 other Revolutionary War veterans.

Along with his smaller donkey pal, he guards the museum’s exhibits and memorabilia.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

Walk over a 150 year old manhole.

The only remaining building in New York to see the inauguration of a president is being slowly overtaken by a grocery store.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

A unique museum dedicated to the Gullah-Geechee people, housed within an old oyster cannery.

A bronze ballot box stands at the spot where Susan B. Anthony voted illegally.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

The abandoned coal loading dock is a canvas for unsanctioned art.

A monument honoring those who died in the Great Famine of Ireland.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

A forsaken wonder in the middle of the East Side neighborhood.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.