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

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 scenic fort on the harbor protected Philadelphia from an attack that never came.

The tombstone of the founder of the lost town of Ogletown is now stuck inside a traffic median.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.