Go to the South Rim [1], stop at one of the visitors centers [2], see the sights at Grand Canyon Village [3], hike along the Rim Trail [4], and explore Hermit Road [5].
Add Desert View Drive [5] and, if it’s summer, spend a couple of days on the North Rim [6], or take a mule trip [7] to Phantom Ranch [8] in the Inner Canyon.
Add a visit to Havasu Canyon and Supai Village, or sign up for a rafting trip through the Inner Canyon [9].
Raft the length of the canyon, and spend a few days exploring the North and South Rims, including scenic drives [5] and hikes [10].
Links:
[1] http://www.moon.com/destinations/grand-canyon/the-south-rim
[2] http://www.moon.com/destinations/grand-canyon/the-south-rim/exploring-the-south-rim
[3] http://www.moon.com/destinations/grand-canyon/the-south-rim/sights/historic-grand-canyon-village
[4] http://www.moon.com/destinations/grand-canyon/the-south-rim/recreation/hiking/rim-trail
[5] http://www.moon.com/destinations/grand-canyon/the-south-rim/exploring-the-south-rim/driving-tours
[6] http://www.moon.com/destinations/grand-canyon/the-north-rim
[7] http://www.moon.com/destinations/grand-canyon/the-south-rim/exploring-the-south-rim/tours
[8] http://www.moon.com/destinations/grand-canyon/the-inner-canyon/sights/phantom-ranch
[9] http://www.moon.com/destinations/grand-canyon/the-inner-canyon/recreation/river-running
[10] http://www.moon.com/destinations/grand-canyon/the-south-rim/recreation/hiking