Arsenal Gallery is a little-known municipal art space in Central Park near 64th St. and Fifth Avenue that's home -- but only through Friday -- to an exhibit just perfect for this time and this place. Titled "The Dance of Nature," the works, by Susan Fishgold, consist of monotypes and constructions based on forms relating to trees, flowers and leaves. Some of the pieces are variations on the same theme, while others are repetitive in form, but they all shimmer and glow and undulate as though Mother Nature walked by with her wand and breathed life into them. --Mila Andre