Denver, the capital of Colorado, is one of the fastest-growing cities in the United States. Known as “The Mile-High City” because its elevation is exactly one mile above sea level, Denver has numerous diverse neighborhoods and attractions that will appeal to all sorts of travelers. Our Denver city tours make the most of the city’s beautiful weather: you’ll find yourself river rafting, rock climbing, hiking and doing other outdoor activities during your Denver tours. Prefer something a little less active? Shopping excursions at Cherry Creek and the Outlets at Castle Rock are some fun things to do in Denver. A full list of adventures can be found below.