A burial ground of rusting metal grave markers.

This abandoned factory on the Hudson River once churned out a million bricks a week.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

A small piece of the composer's New York home lives on in the center of Czech culture in Manhattan.

This mysterious marker puzzles pedestrians and infuriates geographers.

This abandoned ironworks was once the most important military supplier in America.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

Dedicated to preserving the history of free Black communities in Brooklyn and beyond.

Oldest surviving example of a Dutch saltbox frame house in America.

In Little Caribbean, an ice-cream shop serves up regional flavors, including soursop, Irish moss, and "greatnut."

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A 19th century bank turned into a 6-story immersive art experience.

Venture into the past with an unlisted exhibit hall featuring extinct birds.

As the oldest natural history museum in the Americas, these halls contain everything from dinosaur bones to biological samples collected by Lewis and Clark.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Trace the history of the nation’s early days at the site of America’s oldest stock exchange.

Alexander Hamilton’s creation caused quite a bit of controversy.

Where some of America's earliest LGBTQ rights protests marched each Fourth of July

Huge masonic hall in Philadelphia with lavishly themed rooms.

The Fabric Workshop and Museum showcases fabric and mixed media work by artists of great international renown as well as local and outsider artists.

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

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.