Situated in the northwest corner of Arizona, the Grand Canyon National Park welcomes around 5 million visitors a year. Nature and animal lovers, scientists, geologists and archaeologists continue to be mesmerised by the imposing beauty and splendour of its massive layered-rock canyons, river tributaries, fauna and flora, and historical significance. Your touring options are endless: a drive along the incredibly scenic South Rim; a two-day mule trip down to the bottom of the canyon; hiking trails; helicopter or hot-air balloon tours; or white-water rafting down the Colorado River. The park is home to around 500 species of animals and birds, including the endangered Californian condor, and six types of rattlesnakes.