Today's crazy science video: a Science Channel documentary in which scientists pour 10 tons of concrete down a massive anthill, let it harden for a month, then carefully excavate it to demonstrate the internal structure of the colony. It took three days of pumping to fill the colony with concrete.
The sad thing about this is that the colony was alive at the time. And it's a heck of a big colony -- the ants excavated an estimated 40 tons of dirt in its construction.
You may find the narration annoying. It's worth it to see what happens around the four-minute mark, though. The inside of the colony is shockingly well-organized, and looks creepily like an animal's lymph system.