This downtown Phoenix museum is pretty much guaranteed to bring out the nerd in anyone. Whether or not you think you care about science, the Arizona Science Museum offers hands-on experiences that make learning about gravity and electric circuits fun for visitors of all ages. With more than 164,000 square feet of space, the museum offers more than enough to entertain the kids for a day – which isn't to say the adults won't enjoy the trip, too. In fact, according to the museum more than half a million guests come to do so each year. Popular permanent exhibits include “All About Me,” an exploration of the body's inner workings that lets guests walk through a “working” stomach and watch surgeries be performed. You can lie on a bed of nails, build your own electric circuit or ride the Evans Family SkyCycle on any given day as well as enjoy the museum's planetarium and IMAX theater.