Baby, it's getting colder outside, but there are plenty of cozy VRBOs and Airbnbs that may even make you wish for frigid temperatures and a blanket of snow. Hot tubs and saunas? Check. Fireplaces galore? You bet. Whether your winter getaway calls for a cabin in the woods, a snug and sleek city apartment, or something in between, we've found 20 of the best spots to stay warm.