You've walked inside an airport but have you ever wanted to walk on the runway? Take a guided, outside walking tour of the College Park Airport. This is the oldest continuously operating airport in the world. Learn about the many "firsts" that happened at the Airport. These milestones include the first military aviation training facility and the first airmail flight. Discover how the Airport is used today. Guests must be able to walk for at least an hour on uneven, outside surfaces for up to 90 minutes. Please wear appropriate shoes and clothing. Water bottles are permitted. Advance registration is required. Ages 18 & up.