You can find “the city's best views” on the 65th floor, says Lonely Planet. The landmark Lotte building, in the western corner of Hanoi's Ba Dinh district, offers an “uninterrupted vantage point, high above Hanoi's hustle and bustle,” where visitors can “consider the size of the Old Quarter relative to the sheer scale of Hanoi's voracious growth.” Oh, “there is a rooftop bar on the 67th storey,” adds Travelfish.