 Behind the rotunda is an oblong pool with a <unk> ( German : Nymph sculpture ) at the water 's edge created by Fritz Klimsch entitled " Am Wasser " . Behind it stands a flat building on a hill with a terrace — the casino of IG Farben and the Officers Club of the US Army ( " The Terrace Club " ) , which now houses a refectory and lecture @-@ rooms . 
