Many travellers come to Vietnam as a stop-over destination, on their trip to the neighbouring South-East Asia countries or for business purpose (read about Business visa to Vietnam). Many of them find themselves having a few days to spend in Vietnam and do not know how to see the best of the places they are in.
If you have 3 days or less, it is best spent in one city with possibility of a day trip to nearby attractions. The following suggested trips are based on the assumption that your starting point is one of the main cities in Vietnam. They are all do-it-yourself itinerary. However, if you prefer a pre-arranged tour, there are many day trip to major attractions in these cities as well.