Puerto Rico's famed touristic route, a series of lesser roads connecting villages and cities along a coastal circuit, is supremely beautiful all along its length, but it only gets attractive to daring drivers outside the western city of Mayaguez, where the road ascends lush hills to the the island's forested spine. The speed limits here are relatively conservative – never breaking 40 mph – but the switchbacks will still put even the best car through its paces. The climb up the Cordillera is the highlight for most island drivers, but the straighter segments through the coffee plantations higher up are memorably lovely.