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

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

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

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

A toxic ghost town sitting atop a massive coal fire.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

A well-preserved example of an early industrial operation in the northeastern United States.

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

This recreation of a 19th-century dime museum is full of oddities.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A layered tribute to the work of mosaicist Isaiah Zagar.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Yo, Adrian!

An outlandish shoe shaped house built by an eccentric millionaire.