George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

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

The oldest surviving presidential residence in the United States.

One of Philadelphia's largest murals resides hidden under this bridge.

The humble field where the first Major League Baseball game was played.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

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

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

In the early 1800s, surgery was also a show.

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.

Huge masonic hall in Philadelphia with lavishly themed rooms.

A rare view of a preserved Victorian science museum.

Where America's first doomsday cult awaited the end of the world.

Historical figures from New York City's Catholic community reside in Midtown.

Finally, you don't have to be a pious Swedish seaman to relax like one.

This neighborhood grocery houses a treasure trove of Eastern European delights.

Walk into the 19th century without leaving Brooklyn.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.