In Poland there is Baltic Sea. The sea is usually very cold and rough during the whole year. Only in summer on hot days people come there to swim and sunbathe on the beach. Baltic Sea isn't very clean, it is rather polluted. However, it still attracts many holiday-makers and fishermen.
I like sea because it's quite cool place. I go over Baltic sea. Black sea is very salty. Do you like sea? I think that sea is the best place to spend your free time.