... Science, Earth Sciences 24 (2008) 1-9 1 Territorial organization for ecotourism development in Hoang Lien National Park, Sapa District, Lao Cai Province Nguyen Thi Hai, Nguyen Thi Quy Hoi, Tran ... units [2]. 3. Forces for TOET in Hoang Lien National Park HLNP is situated in the northwest of Sapa District, at the triangle of boundaries of three provinces: Lao Cai, Hoa Binh, and Son La. ... March 2008; received in revised form 24 June 2008 Abstract. Hoang Lien National Park, what is located in Sa Pa District, Lao Cai Province, has been planned to develop priority in ecological tourism...