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

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

Where America's first doomsday cult awaited the end of the world.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

This strangely amalgamated museum explores the history of the Timex clock company as well as archaeology.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

Hidden behind a Target are pillows of cooled lava that formed at the bottom of a deep lake in the Mesozoic Era.

This picturesque Victorian ghost town was once a thriving mill community.

It was founded by Ralph Nader to educate the public about an often-maligned area of law.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

This historic railway museum may have lost its passengers but not its love for trains.

The Connecticut village named for its subterranean thunder.

The author of Uncle Tom's Cabin was neighbors with Mark Twain while living in this Connecticut home.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

These etchings reveal the history of a long-gone quarantine site.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.