Didn't look abandoned to me.....unless the ants got sick of all the people and moved their queen and all? What a job!!
That acorn one was sad!!!!
Unless....if he put it down, and they could get their queen and babies quickly to another home, they might have been ok.
I mean, the queens start the whole thing off all on their own....dig a hole, and lay eggs, and feed the babies to start with and all.
I'd love to see the structure set up in a museum, or art gallery, or something.
Looks like an alien city from one of the more organic sci fi artists.
If the ants were there, it's be an ant Pompeii.