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.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

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

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

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

The oldest surviving botanic garden in the United States.

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.

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

World's first "penitentiary," meant to be humane, drove men insane.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Nestled in Coachella Valley, this museum transports guests from the Mesozoic Era, to the land of Egyptian kings.

A giant desert bird that once swung music fans at Coachella now has a home in a nearby traffic circle.

A black and white painted wall creates an optical illusion in the California desert.

A UFO scrapyard in the California desert.

This historic tower in the California desert promises visitors a "vortex of good vibes".

Along a California highway is a kind of Jurassic Park made of metal.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.