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

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

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

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

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

Mysterious rocks that ring musically when struck.

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

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

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

An abandoned theme park with a strange and tumultuous past.

Deadly airliner crash preserved for those willing to climb and pay respects.