Stapleton, Denver Lake Nature Center, one of the nation's largest urban wildlife refuges. As of 2018, Stapleton has a population of around 75,000 residents living amongst 23,500 households. The Northfield section of the development (north of Interstate 70) still has significant residential and commercial development occurring today. The University of Colorado A-Line directly connecting Denver Union Station downtown to Denver International Airport started operating in 2016 and has one stop in Stapleton; the Central Park Station. Stapleton is served by the Central Park commuter rail and bus station, with direct connections to Union Station in downtown and the Denver International Airport via
Pittsburgh International Airport Pittsburgh International Airport Pittsburgh International Airport , formerly Greater Pittsburgh International Airport, is a civil–military international airport in the eastern United States, in the suburbs of Pittsburgh, Pennsylvania. It is located in Findlay and Moon townships of Allegheny County, about west of downtown Pittsburgh, at an approximate elevation of above sea level. It was built to replace Allegheny County Airport, which was closer to Pittsburgh but too small to handle the growing passenger traffic. The new airport construction began in 1946 and opened in 1952. Over the decades, passenger traffic increased for the airport, especially as US Airways developed it