Let the butterfly come to you. That’s vivarium etiquette, along with watch your step — they might alight on the path. The fluttering beauties fly freely in this 3000 square-foot facility, the largest in Southern California, where staff study Western Monarchs and butterfly conservation. See metamorphosis in action and learn about plants that attract these flying pollinators. For butterfly buffs—you might spy a Cloudless Sulfur, a Cabbage White, a Painted Lady, or a Mourning Cloak—among others. Admission $5, kids two and under free.