On the Air Force Academy, there was an old NCO club. When the started to demolish it they uncovered a humongous rattlesnake nest under the foundation. There were literally estimated to be millions of them, as it was a rather large structure.
They ended up dynamiting the nest.
Glad I missed that uncovering. It’s all I can do to wipe my mind’s eye of the snakes slithering one by one into the ground.