Ho Chi Minh City (Saigon) is the sleek modern paradox to Hanoi’s ancient streets. With a population of eight million, the city is flooded with motorbike traffic—crossing the street isn’t for the faint of heart—and towering skyscrapers. While most of the main sights in District 1 are war-related, the city has an unmistakable vibe that will make it hard to leave and some of the best craft beer in Asia.