The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

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

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

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.

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

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

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.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

A toxic ghost town sitting atop a massive coal fire.

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

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

A monument to the Mohawk people stands along an old Native American trade route.

The world's largest piece of copyrighted artwork.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A lighthouse on a diminutive island was one of the first of its kind to guide seamen home.

A men’s restroom became a sandwich shop.

Civil War Fort on an island in the Boston Harbor.