Teraco Skybar is a rooftop cocktail bar in Hanoi, next to Hoan Kiem Lake. The cocktail list includes drinks named after neighborhoods such as Hoan Kiem, Ba Dinh, and Hai Ba Trung. Arriving before 7 p.m. gets you happy hour pricing, and around sunset you can watch the lights come on across the lake. Drinks are on the pricier side.