Hradčany Airport (in Czech Letiště Hradčany, often Letiště Ralsko) is a former military airport within the area of Ralsko in Liberec Region, northern Czech Republic. Built toward the end of World War II for the Luftwaffe, it was expanded after the war. In 1968 the Soviet Army took control and set up a large air base here. However, after the Soviets left in 1991, the airport was abandoned and it is now neglected and damaged.