Bacalar

So why is it called the lagoon of the 7 colors? Because the bottom of the lagoon is pretty uneven, and the color of the water changes depending on the depth. You can walk for meters and the water can first reach your ankles, then your knees, your waist, your ankles again, or you can reach areas where you can't touch the bottom. Aside from the beautiful clear turquois water, Bacalar is also home to stromatolites. Stromatolites have been in existence since the Cambrian age and hence are considered living fossils. They resemble rock like structures that are made up different types of bacteria and one of their function is to provide oxygen to the surrounding environment. There is only a few stromatolites left in the world so their preservation is vital to prevent their extinction. In Bacalar you are prohibited from walking on, touching, or disturb them in any way, you are also encouraged by locals to use organic sunscreen as to protect not only the stromatolites but the entire lagoon habitat.