Is your passion military history? There are historic battlefield sites scattered all over the country (obviously mostly in the eastern US) that are great as vacation destinations. Here are some resources to help you find battlefield sites and parks to visit for various conflicts in various states.
French and Indian War, or the Seven Years’ War (1754-1763)
State Civil War Battlefield Parks
Civil War Traveler has some great information about battlefield parks in each state and other items of interest: