They were in the main parade grounds of the Royal Artillery Barracks. It was a huge, open green field, rectangular in shape, surrounded on all sides by raised green berms, with just a couple of narrow cutouts in them to allow easier passage. There was an oval ring road running just inside; three quarters of it was compacted brown dirt, but the section where they were was paved with stones like a typical Equestrian highway. A large, shallow trench ran parallel to and just inside from the road here, as well.