Home to items never before seen by the public.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

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

This park contains a number of standing stones meant to heal and inspire.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

A field of nothing but boulders which resembles a giant's gravel driveway.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

The world's largest public collection of PEZ memorabilia.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Mysterious rocks that ring musically when struck.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The Decoy Capital of the World.

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.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

A world-class collection of mechanical musical instruments and automata.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

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

The real-life site of Ichabod Crane's infamous gourd attack.