Pedal past rice paddies, coastlines, and water buffalo from Hanoi to Ho Chi Minh City on Vietnamese Adventure, a 15-day boat-and-bike tour organized by Boat Bike Tours (boatbiketours.com/tours/vietnam-tour-with-boat-bike-tours). Along the way, travelers will see the limestone islands of Ha Long Bay, the lantern-lit old town of Hoi An, and the temples and pagodas of imperial Hue before exploring the Mekong Delta. Departing on March 21, 2027, the tour starts at €3,869 per person, double occupancy.