The Mile High City is a fun, exciting, and overall fantastic place to visit any time of the year. I’ve been a resident of Denver for over ten years now, and I really love this city. It’s a big city with a small city feel, and I love exploring all of it.Denver, Colorado is one of the nation’s fastest-growing cities with so much to see and do. The city has a population of about 700,000, and the entire metropolitan area – not even including Boulder to the north – is closing in on three million residents. Despite its constantly increasing size, it has a very welcoming feel.