Difficult to see in this pic, but the tall tower on the right has a large opening in the center-top for fish to swim through. The left tower has a cave in the center the fish can swim into, and exit at the rear. Both towers are away from the back wall, and fish can swim 360 degrees around them. The two towers can also fit together if they were moved to the center of the tank. Lots of thought, planning, trial and error, and a bunch of epoxy went into this aquascape.
