Before I went to Lake Eola, I Dowsed for underground steams at home on my coffee table. This is the marked up Yahoo Map print out. I put the map in my pocket and walked around the lake. When I had an indication of a stream, I took the map out and checked to see if I had a matching X....As you can see from the drawing, I had three. The two un-circled X's were visible water drains.