While I don't know the street address, I believe I can help. It's located at the City Park. Once you find that, you cannot miss it. From St. Louis, I take I 64 East until I get to Mt. Vernon. Turn left at the top of the ramp and go straight until you see the signs for the park on the right. Turn right towards the park, and go until you see the building on the left(actually, you will find the parking lot first). See you there!