Catherine Cruise: Sung Sot Cave, Cua Van and Ha Long (Tuan Chau). Bhaya Cruises: Sung Sot Cave, Cua Van, Ha Long (Tuan Chau), Ba Ham Lake and Vung Vieng. Heritage Line: Ha Long (Tuan Chau), Vung Vieng and Viet Hai (Cat Ba). Quang Minh: Van Don (Ao Tien), Co To, Quan Lan, Minh Chau and Ban Sen. Orchid Cruises: Ha Long (Tuan Chau), Cua Van and Viet Hai (Cat Ba). Tuần Châu Express: Van Don (Ao Tien) and Co To. Mạnh Quang: Van Don (Ao Tien), Co To, Quan Lan and Minh Chau.