Drive to Oracle; there is no mass transit nor trains, and the airport closed years ago. It is located 38 miles from downtown Tucson.
Bicycle to Oracle: especially on Saturday mornings, a surprising number of people can be seen bicycling up State Highway 77 from as far as Tucson. Bicycling to Oracle from Tucson involves an uphill slog of 30 or more miles and a climb of about 2000 feet in elevation. It's for serious cyclists only, but there sure are a lot of them!
Hiking to Oracle is more practical than you might expect; Oracle is on the edge of the Coronado National Forest, and the state-spanning Arizona State Trail skims Oracle's outskirts.
Biosphere Two, 32540 S. Biosphere Rd., Earth's largest fully enclosed and sealed terrarium, covering over three acres. Originally built by a strange (but very well-funded) organization with alleged cult connections, for conducting ecological experiments. More recently Biosphere Two has been turned over to Columbia University and then the University of Arizona for scientific research. Oracle and Oracle Junction are the nearest town and village respectively. Tours are available; standard price is $20/person, with discounts for old people, students, children, and people with convincing fake student IDs.
Oracle State Park has an "Environmental Learning Center", but no camping.
The Acadia Ranch Museum, 825 Mount Lemmon Rd., has several exhibits relating to the history and culture of Oracle. Hours are somewhat minimal: probably 1pm-5pm Friday and Saturday.
The Ranch Store Center, 1015 W American Ave., includes an open-air gallery of large metal sculptures. Open Tuesday-Sunday.
Snow, on those occasions when a few inches fall, if you've been living in Tucson too long and have forgotten what it looks like. The Tucson media will tell you when it's time. Oracle is much easier to drive to in snowy weather than it would be to use the narrow, twisty, cliff-bordered roads into the Santa Catalina Mountains, that's for sure. For extra thrills, shovel someone's walk or driveway (after asking permission of course.)
The Station, 1395 W American Ave, provides organic and natural foods, vitamins, and other health products, a function room for classes and meetings, and a comfy space to use wireless Internet, or just hang out. Update as of May 2009: the Station has gone out of business.
DeMarco's, 1885 W American Avenue, Oracle, (520) 896-9627. Largest, most diverse menu of any Italian restaurant in Oracle, including some unusual items. Try the eggplant parmesan sub (not a misprint!) Serves American/Mexican breakfast, predominantly Italian lunch & dinner. $6-$13.
Lupe's, 35530 N Highway 7779, Oracle, (520) 818-7855. Simple, but tasty Mexican food. If you get the beef, make sure it's the machaco (shredded). $7-$10.
Nonna Maria's Pizza, 2161 Rockliffe Blvd., Oracle, (520) 896-3522. Tasty Italian food (pizza, pasta, calzones) in a casual, but attractive setting. Family run, with paintings by the chef/owner on the wall. $8-$12.
Oracle Market, across from the Post Office. Open 8-8 (Sundays about 9-7). Groceries + deli.
Eat weeds, bugs, and other natural foods, in the countryside, etc. Be careful not to damage people's yards, gardens, or related property! Also, don't poison yourself. A surviving alternative to the late, lamented Station.