Swimming is a classic summertime activity for all ages, and Arizona's swimming season lasts a lot longer than in many parts of the country. Arizona has a surprising number of lakes you can swim in.

Lake Havasu and Lake Austin rank among the warmest lakes for swimming in the country, according to a WorldAtlas report.

Arizona is not just a dry desert — the state has about 130 lakes and five major rivers, according to the Arizona Office of Tourism. Though only two of the lakes are natural and the rest are human-made ...