There was an H-tree in Lansdale which marked the entrance to hell. It was two trees that grew side by side and were connected in the middle. There are only a few trees like this in the world, all gateways to hell.
The tree stood atop a 12 foot cliff, and the story is that if you walk under the middle of the trees and around the trunk of one of them 6 times and jump off the cliff, the ground will open up and you will fall into the depths of hell.
It is said the H-tree no longer stands, it was knocked down during a construction project.