Quang Ninh is a mountainous and coastal province, with more than 80% of its area being made up of mountains and hills. The sea and island zone of Quang Ninh has a unique terrain. There are more than 2,000 islands, making up two thirds of the Vietnam's islands.
There are many beautiful beaches and natural beauty spots such as Ha Long Bay, Bai Tu Long Bay, Tra Co Beach, Co To Beach, Dai Beach in Van Don etc. Besides, there are historical and architectural relics enabling the development of tours on land, sea and islands.
(http://www.vietnamtourism.com/e_pages/country/province.asp)