One of the world's largest model railroads is a mind-boggling achievement.

A unique sculpture park that specializes in the huge and bizarre.

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

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

A rare view of a preserved Victorian science museum.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

Century-old shop, specializing in Occult products.

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