Pennsylvania on Trulia. Wilmington Find Cheap Car Rental Deals in Columbia-City Denver, CO Compare and book cheap Denver car rentals with . Rent a car in Denver, Colorado and find the best discounts and deals today. Denver Wikitravel Denver is Mount-Sterling a bustling city of more than 600,000 people supporting a fastgrowing metropolitan area of nearlymillion people. The city embraces its cowboy and mining.