Grand Canyon National Park

One of the world's largest canyon systems, carved by the Colorado River over millions of years to expose nearly two billion years of Earth's geological history. The South Rim offers year-round access, paved overlooks, and well-maintained trails including the Bright Angel and South Kaibab routes descending to the river. The North Rim, higher in elevation, is open only in summer. Inner-canyon hiking requires careful preparation due to extreme summer heat.