A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

The king of U.S. high points towers over every other peak on the continent.

A failed piece of Orientalism has become the proud symbol of a community.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The first of Lancaster's "rural cemeteries."

The oldest farmer's market in America is so ancient it was approved by the King of England.

An outlandish shoe shaped house built by an eccentric millionaire.

A local prank turned town icon.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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

Century-old shop, specializing in Occult products.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

Yo, Adrian!

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

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

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

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

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

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