Hoi An is “ideal for cycling,” writes Alexis Mastroyiannis at Suitcase, because of its “flat topography and breezy cradle between the beach and river.” Where to go? “Trace the road along the riverfront and cross over to the larger islands to see Vietnamese rural life at its most picturesque, complete with half-built pagodas, water buffalos and miles of rice paddies.” You can pick up a bike from almost any hotel or guesthouse, she says, but remember: “it can get fiercely hot in high season.”