Buying a family membership at your local science center will get you a passport for entrance to science centers all over the nation. It's definitely a bargain if you can visit several in a year! This one is noisy. They don't seem to require minors to be supervised by responsible adults at a reasonalbe ration of children/adult.
- The Historic Ships of Baltimore's Inner Harbor
- Gunpowder Falls State Park Wildlands Loop
- Cedarville State Park - A Long Hike Amongst Carnivorous Plants