Cave Of Kelpius, Philadelphia - Ancient Aliens?

Let’s take a look at this mysterious cave in Philadelphia called the Cave of Kelpius. It is located in the woods and I am going to show you the inside of the cave and some really weird details about its connection to a secret society and even extraterrestrials. This cave was built by a man called Johannes Kelpius, popularly known as the “Monk of the Ridge“. It is not accurate to label him as just a monk, because even though he was a religious person, he was more of an astronomer and a scientist. He even had