Pennsylvania's own Roswell-style UFO mystery.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

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

This church in Pittsburgh is home to the largest collection of religious relics in North America.

This might just be the TARDIS of bookstores.

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.

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

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

Mysterious rocks that ring musically when struck.