Arizona’s most famous and distinct park, Grand Canyon has nearly five million people who see its 1-mile deep (1.6 km) each year. The North Rim, averaging 8,000 feet (2,438 meters) above sea level, rises 1,000 feet (305 meters) higher than the South Rim. Because of its remote location, it is much less accessible than the South Rim. The South Rim, which is open to the public all year round and the most visited rim has the Grand Canyon Village, is the center of activity and the transportation hub of the park. The village is the only place where the railroad reaches the rim of the canyon.*
This park can be explored using the hiking/walking trails, by helicopter, pink jeeps and white water rafting depending on what type of adventure you prefer. We used a private tour company based in Las Vegas and availed of their South Rim Bus Tour, which I may say is a good start to see the the Canyon at Bright Angel and Mather Points.
Info via Grand Canyon National Park Service