Once you’ve been sufficiently invigorated by the cities, channel that energy into exploring Vietnam’s natural wonders. Many visitors make a beeline for the limestone cliffs and pale green water ofHalong Bay, but don’t let that be the extent of your outdoorsy experience. Take a motorcycle trip through the windingHai Van Passbetween Hue and Danang, weaving through a mountain highway with coastal views on one side and dark jungle on the other. Strap on your boots and descend intoPhong Nha Ke Bang National Park, where some of the world’s largest caves have recently been discovered. For those looking to relax on sandy beaches, boat out toPhu Quoc Islandfor the summertime vibes. And don’t miss peacefulLak Lakeup in the central highlands, where Stray passengers have their homestay in a M’Nong village.