Do Son is 20km from the centre of Haiphong and is a popular weekend spot for residents of Hanoi. If you are staying in Halong Bay a half day visit to Do Son beach is worthwhile. You can also see the buffalo fights which are held on the tenth day of the eighth lunar month.
Take a taxi from nearby Haiphong.
There is some accommodation in Do Son but most visitors are likely to prefer Haiphong which is only a short distance away.