Is it still really necessary to present the Grand Canyon? I doubt it. This canyon dug by the Colorado River is one of the seven wonders of nature and was declared a UNESCO World Heritage Site in 1979. We arrived at the Grand Canyon National Park at 7pm because the best times to see the canyon are at sunrise and sunset. A friend told us, "I went to the Grand Canyon several times, and each time I saw something different." That's right, the diversity of shadows and lights offered by changing sun are breathtaking. You will soon feel very small. The Grand Canyon is obviously a must! You can't miss it!