The U.S. is brimming with historic sites to visit, and -- if you're a history buff -- totally nerd out over. There's everything from touristy points of interest, like the Alamo and Arlington Cemetery, to small, local sites scattered across the country.
These lesser-known historic spots would make the perfect stop on a summer road trip. Most of them are also located in some really beautiful places, so if your travel companions aren't down to nerd out they have plenty of pretty scenery to look at. Go there...