Huntsville earns its Rocket City nickname many times over. The U.S. Space and Rocket Center is one of the best science museums in the country, and the city's NASA connection runs deep — the Marshall Space Flight Center campus next door still tests rocket engines. Downtown offers walkable history in the Twickenham and Old Town Historic Districts, where antebellum mansions line quiet streets a few blocks from the courthouse square. Monte Sano State Park gives you mountain trails and long views over the Tennessee Valley. For a city of its size, Huntsville punches well above its weight.