One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The artwork commemorates the many ways 20th-century people perished while on the clock.

A sculpture of a salmon swimming through a brick building.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

The seamy, underground secrets of Portland's criminal past.

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

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

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

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

This beloved marketplace mascot poops money and grants good luck.

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.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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

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

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

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.