16 Tuanjiehu NanliOn East Third Ring Road, opposite Friday's
团结湖南里16号东三环东星期五餐厅对面
This park is surrounded by water on three sides and is home to a man-made beach, outdoor pool, roller-skating rink, pigeon house and amusement park.
just an fyi - this is probably seasonal, so you should call ahead before going to check it out... definitely no beach there in March!