If there is anything that's missing in Madrid, it has to be its lack of beaches. There is even a famous song about this. But while it is true that the capital is away from the sea, it does have a few designated areas within vicinity for swimming in rivers and lakes. With its natural landscape environment, there is no reason to envy the beaches.
Less than 70 kilometres from the capital, the "Madrid Beach" (Playa de Madrid) is a dam located in San Juan. This is the only artificial lake in the entire city of Madrid where bathing and water sports are allowed. Built in 1955 for the purpose of supplying water and electricity to the southwest regions, it has over 14 kilometres of beach for everyone to enjoy. The most visited area is the Virgen Nueva (in San Martin de Valdeiglesias), with beautiful sand, restaurants, and canoe rentals in spectacular surroundings.