Denver is the capital and largest city of Colorado, located at the confluence of US Route 70 and Interstate 25. With a population of 715,522, it is the 19th largest city in the United States.1 Denver is known for being the home of railroad connections around the country due to its gold mining history. The capital building is coated in 24 karat gold.2 Denver is the only state capitol located at exactly one mile in altitude. It is situated at 5,280 feet above sea level, well below the state’s average elevation of 6,800 feet above sea level.