Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

The Home and murder site of the witch of Rehmeyers Hollow.

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

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

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

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

The world’s first penitentiary, meant to be humane, drove men insane.

The cedar tree in Highgate Cemetery earned its title by accident.

A mass grave for victims of one of the city’s worst fires.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.