Surprisingly, a livestock shelter. It can be completely open inside or divided into 3 sections by opening/shutting chaining the panels. I've had to treat 3 calves for pneumonia and working them has been as easy as shutting them into one of the sections, squeezing them into a corner & securing the panels. I have a halter & rope handy but haven't had to use either; just dump some cubes in a bowl, let them eat, take their temp & give them a shot. Ironically, the chute is sitting on the trailer right next to the shelter but we still haven't moved the portable corral.