Hang Cau Sea Cliffs: Towering Volcanic Walls by the Ocean
Discover Hang Cau on Ly Son Island: majestic volcanic cliffs, turquoise clear bays, paddleboarding experiences, and travel photography guides.
Nestled at the eastern foothills of Mount Thoi Loi, Hang Cau (Cau Cave) presents one of the most awe-inspiring geological landscapes in Southeast Asia. Giant vertical volcanic walls carved over millennia stand directly against crystal-clear turquoise ocean waters.
Hang Cau is best enjoyed on calm seas (April to August). In rough winter seasons with high ocean swell, waves can crash dramatically against the cliff foot.
Highlights & Activities at Hang Cau
1. Distinct Sedimentary Volcanic Strata
Walking alongside the base of the cliffs reveals hundreds of layered sedimentary lines formed by volcanic ash and basalt flows. The contrast between yellow-ochre cliff faces, black volcanic bedrock, and cobalt sea creates an unforgettable visual spectacle.
