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

The oldest farmer's market in America is so ancient it was approved by the King of England.

This might just be the TARDIS of bookstores.

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

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

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.