Old Quarter, Hoan Kiem Lake, and French Quarter; scooters everywhere. Grab for transport; cross streets slowly. Cooler than HCMC; distinct seasons.
Phở, bún chả, and bia hơi define dining. Egg coffee; street food. Halong Bay and Ninh Binh nearby.
TopTenAtlas lists help you choose where to eat, stay, and explore. Halong, Ninh Binh, and Sapa round out a stay.