Denver,Colorado

Denver. City and County of Denver is the capital and most populous city in the U.S. state of Colorado. Denver is a city-county consolidation, located on the South Platte River Valley on the west Highlands in the east of the Front Range of the Rocky Mountains. Denver downtown district is located immediately east of Cherry Creek meeting with the South Platte River, about 12 miles (19 km) east foot of the Rocky Mountains. Denver is nicknamed the "Mile-High City" because its official elevation is exactly one mile (1.6 km) or 5280 feet (1,609.344 m) above sea level. 105th meridian west of Greenwich passes Union Station and temporal reference for the Mountain Time Zone.

And it turns out Colorado has a very large airport, and is believed to have its many underground tunnels. Based on the relics were found, believed the tunnels were built by the military as the Masonic Temple as a haven from attacks musuh.Di find the extensive underground tunnels that connect to each other under the city.