http://imgur.com/a/Ns6hG
From another website:
If you go to St. Louis MO, and visit the Bellrieve (sp?) Park...walk a little ways down the tracks, and to your left, if you pay close enough attention, there is a very over-grown patch of the woods that looks enough like a trail.
If you go through, you come across these stairs. They are pretty battered and beat up...and actually a tad dangerous to go up.
They are known as "Angel Stairs" because this area used to be where the Hells Angels originally hung out at, and all the people who have died trying to climb up and down them..etc