Nice little walk, just take the path up the hill from Bunk Stay - only 10 minutes. The place is just an old water tank that was used to feed water to all of Laxman Jhula. The ditch around the edge was to stop elephants walking onto the top.
We went looking for this place cause we were very curious about what it is but unfortunately i think the pin on the map is wrong so we werent able to find it :(
Gateway to another dimension
Useless.