Often marked by a large subsidence crater or a "shot tower" for atmospheric tests.
Reinforced bunkers or mobile remote-control ships (like the Emba at Novaya Zemlya ) used to trigger detonations from a safe distance. nuclear test site (lekoopas private map)
Features like vertical shafts for underground tests or horizontal tunnels bored into mountains (e.g., Punggye-ri in North Korea). Often marked by a large subsidence crater or