July 20, 2009
What are(were) these towers used for? The other pic is a hint.
Cracked by: shenoyvarun86, krudebox , udupendra , Dibyo , tete80 , Logik , duriel , Rogi , Siddharth Jain and Hitesh T S.
The picture shows a shot tower used to manufacture lead shots. You drop molten lead from the top, and catch it in a water basin at the bottom. The free fall in between shapes the projectile appropriately.