A World War II-era submarine is stuck in the mud in New Jersey.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

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

This extraordinary model train layout covers over 1,700 square feet, with multiple trains running simultaneously.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

Mysterious rocks that ring musically when struck.

This small-town pizzeria won the Hollywood lottery.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Vermont's hills are alive with the sound of music at this historic hotel.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Abandoned blast furnaces are an enduring reminder of Scranton's once booming iron business.

This national landmark is also home to a massive treehouse.

Grand architectural relics gain a new life in this Pennsylvania warehouse.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

One of the world's oldest continually operating bookstores.

This haunting monument honors the victims of 9/11.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

A simple plaque remembers an act of WWI terrorism that obliterated an island and forever scarred the Statue of Liberty.

The final resting place of a famous 19th-century murder victim whose identity is still a mystery.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.