With a surface area of nearly 170km², a coastal length of 70km, and warm and clear water no more than 7 m in depth, it is "the largest swimming pool in the world", in the opinion of famous swimmer and Hollywood actress Esther Williams.
Viña del Mar | Mar del Plata | Viña del Mar International Song Festival | Mar Roxas | Del Mar, California | Mar | Del Mar | Roquetas de Mar | Mar Thoma | Mar Menor | MÄR | Eric Mar | Louie Mar Gangcuangco | Lloret de Mar | El Perro del Mar (album) | El Perro del Mar | Earl of Mar | Café del Mar | Baselios Mar Thoma Paulose II | A Ver-o-Mar | Savanna-la-Mar | Santa María del Mar | Santa Maria del Mar | Pen Mar, Pennsylvania | Pen Mar | Margaret of Mar, 31st Countess of Mar | Mar Elias | Mar del Plata Film Festival | Mar-A-Lago | Mar Aba |
It also occurs on the Mediterranean islands of the Islas del Mar Menor and the Isla de Nueva Tabarca and the Atlantic islands of Cies Islands, Pessegueiro Island, Ons Island and Islote de Sancti Petri.
The Mar Menor coast belongs to other three municipalities: San Javier, Los Alcázares and Cartagena.