 Geography also allows Denver to have a considerable government presence , with many federal agencies based or having offices in the Denver area . Along with federal agencies come many companies based on US defense and space projects , and more jobs are brought to the city by virtue of its being the capital of the state of Colorado . The Denver area is home to the former nuclear weapons plant Rocky Flats , the Denver Federal Center , Byron G. Rogers Federal Building and United States Courthouse , the Denver Mint , and the National Renewable Energy Laboratory . 
