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

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

A daily replay of the experiment that proved the rotation of the Earth.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This jail which was in service for over a century is now open for curious visitors.

A local prank turned town icon.

This elaborate towering structure was once famed for its revolutionary height.

An outlandish shoe shaped house built by an eccentric millionaire.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

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

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

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

Yo, Adrian!

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

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

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.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

In which a local geological marvel becomes a quaint roadside attraction.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

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

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

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.

Mysterious rocks that ring musically when struck.