Find crucial information and trip planning details about Adamstown, which is a city in United States. The nearest major city to Adamstown is Philadelphia. Attractions in Philadelphia include National Aquarium, Horseshoe Casino, Oriole Park At Camden Yards. If you want to fly to the destination, you can choose the nearest major airport to take a flight. The nearest major airport is Philadelphia International Airport. To explore Adamstown, set aside 1 to 2 number of your days. You'll be coming back for more!