An outlandish shoe shaped house built by an eccentric millionaire.

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

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

This park contains a number of standing stones meant to heal and inspire.

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

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

This Old Testament garden features 100 plants from biblical times.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A park full of outsider art, created by college students studying outsider art.

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

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

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

A rare view of a preserved Victorian science museum.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

The morbid items in this small and hidden museum are not for the weak stomached.

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