Morning in Hanoi smells of cinnamon and hot broth; scooters thread between colonial facades while vendors braid fragrant herbs into banh mi. By the second day you’ll be trading city grit for the liquid cliffs of Ha Long Bay, limestone karsts rising like ancient watchmen, the sea daring you to wake early for the sundeck. Across the central coast, Hue’s citadel carries the weight of the Nguyen emperors; Hoi An’s lantern-lit alleys whisper of Chinese and Japanese traders; Nha Trang opens a marine stage, while Ho Chi Minh’s French boulevards pulse with modern energy.