If summer means the beach to the inhabitants of Greater Buenos Aires, Mar del Plata is most often the beach they are thinking of. Situated on the northern Atlantic coast, 400km from the capital, beaches in this area sprawl for eight km, with sophisticated mansions (reflecting the area's upper-class origins) mingling with the new middle-class resorts. Sea lions keep an eye on the fishing activities around the wharves, and a replica of the grotto of Lourdes is a kitsch paradise.