I live near Aberdeen proving grounds. They’ve been building and testing munitions there since pre-WWI.
There’s tons of unexplored munitions in some areas, including very well marked coastlines on the Chesapeake Bay.
I’ve heard that they frequently start wildfires when they blow stuff up. If they can’t extinguish it with a water cannon they use helicopters. No one ever steps foot in those areas.
From the people who brought you the EPA.
I lived in Monterey, Ca for a year. Fort Ord was just a mile or two East. The old fort had an artillery firing range. I would hear them firing, and shells exploding, now and again.
There is a range of sand dunes in back of the beach on the fort. During WW2 the beach was used as an aerial torpedo range, and the other side of the dunes was used as a firing range for small arms and who know what else.
When the fort closed, long after I left the area, I read that the various ranges would be off limits for decades. There is too much unexploded ordinance to even consider clearing it.
There is no "s" in Aberdeen Proving Ground. Yeah, I worked there. Our public affairs folks taught me that saying. They'd use it on the media.