No, Not A Pinata, But A Wasps' Nest

Look, up in the tree, it's a balloon? A ball? A pinata? Nope, it's a huge wasps' nest! So amazing. We were driving on Q Street NW in Washington DC and looked up at what we thought was trash or something in the tree but on closer inspection turned out to be a giant wasps' nest. Or at least that's what I think it is as it looks like one I once saw in a museum.  I zoomed in with my camera and saw the opening and expected to see things buzzing in and out but it's probably too cold for wasps right now.  But I am wondering, where do wasps go over the winter? Do they die or hibernate?  I'll have to go look this up!

Well, I just ran off to Wikipedia about wasps and learned a lot including that it is probably a wasps' nest as "social" wasps chew trees and other stuff to make a paper pulp to make their nests. Apparently there are lone wasps too, but they don't make big nests and live together. (Sounds like some people we all know!).
I expect this nest will get covered up as the tree leafs up but I'll keep an eye out in about a month and see if I can still see it. 
The address for this wonder of nature is about 1406-1408 Q Street NW, just east of The Bike Rack shop nearby.