This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

Alexander Hamilton’s creation caused quite a bit of controversy.

For decades, it has disappeared and reappeared as water levels rise and fall.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The last street in Pittsburgh that's paved with wood.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

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

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

This might just be the TARDIS of bookstores.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

The final resting place of infamous outlaw Clyde and Marvin Barrow.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

The final resting place of an outlaw, whose legend grew after death.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Shop for books in the New Orleans house where William Faulkner once lived.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

America's most famous piece of self-built architecture.