With towering mountains, cascading paddy fields and world-famous limestone karsts, it's easy to see why Northern Vietnam has some of the country's most beautiful scenery. Begin the adventure in the buzz of Hanoi, sampling delicious local delicacies in street markets and enjoying the local café scene. Next, head east to explore picturesque Ha Long Bay and its islands, either from the water in a kayak or wooden junk, or from above on a scenic flight or helicopter tour.