While probably not ideal for very young children because of the amount of walking you'll have to do, Washington DC is a perfect escape for families with school-aged kids. Being able to be outside, see the different monuments, visit the National Mall, and learn a bit about American history is a wonderful experience. For animal-lovers, the National zoo is a must visit, and a number of museums and other activities are available for rainy days. Fun fact: there are more than 100 things to do in the city that are free.