Microcosm Turf. The cursor is pointing at the avatar, showing her name to be Sunstar. (Avatar labels always appear in purple, objects in yellow, regions in green, so you can tell what's what.) The objects in the region came from a Catalog, and the avatar moved and rotated them to decorate the turf. The purple square against the left back wall is a portal to another region. If you click on it, your avatar teleports to that region.
