Visit the Tucson Botanical Gardens, an urban oasis in the middle of the city, during its Summer Oasis Series of special events. On Thursday and al Fresco Friday evenings, from 5 to 8 p.m., relax after the heat of the day. The on-site Cafe Botanica is also open late and serving a special dinner menu; call 520-326-9686, ext. *37 for cafe reservations. See TucsonBotanical.org for other Summer Oasis Series happenings.