Right now we have an assortment of small stones in the atrium. There is a water faucet in in the lower right corner, and I believe the bottom has a cooper or tin tray (I've only owned the house for 2 yrs (built in 1978) and I don't know if this was ever used as a coy pond, but I doubt it). I'm not against a water feature of some type in this area, but wouldn't count on using the existing tray to hold water. The lighting above is four incandescent bulbs right now, with plexiglass covers (which I hate). I was thinking about enclosing the atrium with glass on two sides to have a temperature controlled room for growing and displaying plants (mainly orchids), but thought it would be difficult to maintain and difficult to make it look nice. I thought about using wood slats along the sides and bottom of the atrium because I like the look of wood and it would be nice for hanging plants. I tend like simple modern asian design using warm colors. If you have any ideas to show off this space I would certainly be interested in listening. Thanks!