A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A terrific purveyor of natural history objects and curios.

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

Century-old shop, specializing in Occult products.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

An Irish Memorial commemorating those who perished due to potato blight.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

The oldest surviving botanic garden in the United States.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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

Mysterious rocks that ring musically when struck.

A museum of anything and everything Stooge.

The site of one of history's most indelible and horrific tragedies.

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

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

Seven people are buried in the middle of what's now a movie theater parking lot.

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

A glittering Thai Buddhist temple in suburban Pennsylvania.

One man's lifelong obsession with death.

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