Hang Rai

Hang Rai is a coastal rock formation and beach in Vinh Hai Commune, Ninh Hai District, Khanh Hoa Province, within Nui Chua National Park, about 35 km northeast of Phan Rang-Thap Cham. It is notable for its vast ancient fossilized coral reef field known as the Moon Field, tide pools, sea caves and clear turquoise water overlooking Vinh Hy Bay. Part of the Nui Chua UNESCO Biosphere Reserve, it is a popular sightseeing and photography destination.

Visitors can expect a dramatic rocky coastline with a flat, moon-like field of ancient fossilized coral, interspersed with tide pools, natural rock arches and small sea caves. The area overlooks the clear waters of Vinh Hy Bay and the mountains of Nui Chua National Park. There are designated walking paths over the rocks, viewpoints for photography, and shallow pools visible at low tide. The setting is natural and largely undeveloped, with a ticket gate, parking area and small stalls near the entrance.

Hang Rai lies within Nui Chua National Park, established in 2003 to protect coastal and semi-arid ecosystems. The park and its marine area were recognized as part of the Nui Chua UNESCO Biosphere Reserve in 2021. The exposed coral reef field is an ancient fossilized reef, illustrating long-term geological and sea-level changes along the south-central coast.