Mouse droppings

Yesterday I learned that the trees outside the building I work at in the large-n-fancy university are small not because the building I'm in is new but because something else is. A few years back they constructed a multistory building under the quad to house mice.

Had I not been told of its existence, I would never have known the building was there. Sometimes, apparently, it smells like mice aboveground, but I've never caught a whiff.

They offered tours of the facility when it was first built but now there's no way in unless you're authorized. Or a rodent.

Creeeeeeeeeeeeepy.