We will get to Cruz del Sur bus station from Parachas around 4pm. We want to go to Centro Historico and Mirafloresby metroplolitano bus. We wonder if it is safe to walk from Cruz del Sur bus station to Javier Prado metropolitano bus station. From google map, it looks like a 20 min walk. We don't have big luggage, just small daypack. Which stop should we get off in Centro Historico and Miraflores?