It must almost be summer, because all the big outdoor art installations and massive crowd-generating shows are opening. Well, you can add another must-see summer exhibition to the list, with Brazilian installation artist Ernesto Neto's massive anthropodino opening at the Park Avenue Armory today (through June 14). The sprawling, drippy, sinewy and cave-like construction (seen at right) looks a little like being inside a giant's digestive system. A giant with eclectic food tastes, to be exact, as many of the installation's tentacles and stalactites are weighted with bags of exotic spices. Smells like good art.