Coastal highway PR-901 winds around the rugged southeast corner of the island, where the mountains of the Central Cordillera collapse gracefully into the sea. Though only a short drive south of Palmas del Mar, the towns and villages here seem unusually remote and despite jaw-dropping vistas and a smattering of windswept beaches, see far fewer tourists.
Autopista PR-53 ends abruptly at the long causeway over the Río Guayanés wetlands, near the former sugar town of Yabucoa. Follow PR-901 along the coast from here, towards Maunabo and the heart of sugar country. You can also head inland on the Ruta Panorámica – the first section of this mountain highway actually follows PR-901, before looping back to Yabucoa on PR-3.