In honor of #nationalswimmingpoolday we want you to share your best photos of your favorite pools 🏊‍♂️! Tag arenausa and we’ll feature our favorite shots 📸 - like this stunner from kazek89 😮. A few fun facts about this day: 🥇The oldest known swimming pool dates back to 3000 B.C. in Mohenjo-Daro 🥈 The first heated pool was built in 100 B.C. by Roman lord Gaius Maecenas 🥉 The first Swimming Club was started in 1844 - the Maidstone Swimming Club in Kent, England