DH Travel Company provides a 6-day tour of northern Vietnam including visits to Hanoi, Halong Bay, and Sapa. The itinerary includes overnight trains between destinations, guided sightseeing and activities, meals, accommodations, and transfers. Highlights are exploring Old Quarter in Hanoi, cruising Halong Bay, and hiking through villages of ethnic minority groups in Sapa. The tour offers options for 3, 4, or 5-star hotels and transportation.