Is there a way to remove or manipulate models that are already a part of a map?

This chair in badwater is what i'm after in particular. I have a scene in mind that makes use of this chair, but i want to be able to make it so the chair swings around with a character sitting on it looking all cool.

Currently, i can't figure out how to manipulate this model so i can do what i want with it. Is there a way or is it stuck to the map?