The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

This public space is speckled with the eerie remnants of a defunct amusement park.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

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

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

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

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

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

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

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

The oldest surviving botanic garden in the United States.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

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.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

A beautiful oddities shop crammed with strange and morbid curiosities.