Walk, not run, into the amazing Sonoran Desert with a guide from this tour company. The originators of "eco tours," this company feels strongly about protecting the natural world while allowing visitors to discover its beauty. Take a three-hour hike into the McDowell Mountain Preserve, or a five hour Desert Tour. Kids under 12 are half off the adult price. Call for further information or reservations, or refer to the Web site. Bring cash. Credit cards are not accepted.