One of the world's largest model railroads is a mind-boggling achievement.

A "house to which to flee" for settlers in colonial Pennsylvania.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

The site of a tragedy in 1908 that claimed the lives of 171 people and changed fire safety laws across the state.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

This collection of odd proofs of concept is like taking a walk through the imagination of a Victorian engineer.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

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

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

An unusual assortment of steerable wooden sleds is on display in a library in New Jersey where they were first invented.

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

The oldest surviving presidential residence in the United States.

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

The final resting place of one of the United States's greatest poets.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

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

One of Philadelphia's largest murals resides hidden under this bridge.