Cai Chien Island

Cai Chien Island is a coastal island in Cai Chien Commune, Hai Ha District, Quang Ninh Province, northeastern Vietnam, about 15 km offshore in the Gulf of Tonkin. Covering around 2,500 hectares, it is known for long white-sand beaches, casuarina forests and a quiet fishing village atmosphere. The island features three main beaches — Cai Chien, Dau Rong and Vang Chau — and remains relatively undeveloped, offering a natural beach destination near Mong Cai and the Chinese border.

Visitors can expect a low-density island with long sandy beaches, clear shallow water, casuarina and pine groves, and small fishing hamlets. The interior has flat coastal roads suitable for cycling and motorbiking between beaches and villages. Facilities are simple, centered on homestays, guesthouses and local seafood restaurants. Activities focus on swimming, beach walking, camping, kayaking and exploring fishing villages. The island is reached only by ferry or speedboat from the mainland wharf in Hai Ha.

The island is home to a traditional fishing community with small hamlets, fishing boats and local seafood livelihoods that shape daily life and visitor homestay experiences.