The Rambla of Montevideo is the coastal avenue that goes along the coastline of the Rio de la Plata in Montevideo, Uruguay. At a length of over 22.2 uninterrupted kilometres (13.7 mi), the promenade runs along the Río de la Plata and continues down the entire coast of Montevideo. Since most of the southern departments of Uruguay face either the Río de la Plata or the Atlantic Ocean, they all have ramblas as well. The Rambla is an integral part of Montevidean identity and has been proposed as a World Heritage site.[Wikipedia]
Rio de la Plata has a huge delta, what you see is river, not oçean. Taked with my canon G15
HBM