Fun facts about this rocky mountain state: Denver, lays claim to the invention of the cheeseburger. The trademark for the name Cheeseburger was awarded in 1935 to Louis Ballast. Colorado contains 75% of the land area of the U.S. with an altitude over 10,000 feet. Colorado has more microbreweries per capita than any other state. The world’s largest natural hot springs pool located in Glenwood Springs. The two-block long pool is across the street from the historic Hotel Colorado, a favorite stop of former president Teddy Roosevelt.