If you're a responsible traveler you probably arrive at Sky Harbor Airport more than two hours before your flight. Good for you, you won't have to run to your gate. That also means you have time to check out the Phoenix Airport Museum before you board your plane. The airport's collection of art includes almost 600 pieces of artwork that promote Arizona's artistic and cultural heritage. The works, which have been acquired for the most part with percent-for-art money or through donations, can be viewed at locations throughout Phoenix Sky Harbor International Airport, Sky Harbor Rental Car Center, Phoenix Deer Valley Airport and Phoenix Goodyear Airport. The majority of the exhibits are on display for about six months at a time, though several collections are considering on-going and have been on display for several years. And unlike at a typical museum, all the exhibits at Phoenix Sky Harbor at open 24-hours a day.