The only other places I've really felt comfortable using it have been on beaches and in the ghost town I was telling you about. The situation was that this ghost town is at the bottom of a reservoir. The whole town was torn down and submerged by a water in 1953, but recently they were doing some waterpipe work and had to drain the whole thing. There's a bridge down there, foundations, steps, old roads, tree trunks, it's pretty cool. They have been submerged again, so it is no longer available.