What is AREA 51? -It is a large military airfield on the south shore of Lake Groome. It is located in southern Nevada in the western United States. Officially, the primary purpose of the base is undetermined, but based on historical evidence, it likely supported the development and testing of experimental aircraft and weapons systems. -But some people don't believe in this theory and that's why they decided to invade the base and find out for themselves what's really going on in Area 51.