Mui Ca Mau

Mui Ca Mau National Park protects 41,862 hectares at the southernmost tip of mainland Vietnam, in Ca Mau Province. The park encompasses the Ca Mau Cape, a UNESCO World Heritage Site and part of the Ca Mau Biosphere Reserve, and contains one of the largest remaining mangrove forests in Asia outside Indonesia. The park sits at the confluence of the Gulf of Thailand and the South China Sea, creating a dynamic coastal environment shaped by tidal currents and sediment deposition. The Ca Mau Cape is historically and symbolically important as the southernmost point of Vietnam. The park was formally established in 2003 and includes marine, intertidal, and terrestrial habitats.

The mangrove forests of Mui Ca Mau support extraordinary productivity, nurturing juvenile fish, shrimp, and crab populations that underpin the region's commercial fisheries. Colonial nesting birds including various heron species, little egrets, and pond herons form large rookeries in the mangrove canopy. The park's coastal waters are used by the Indo-Pacific finless porpoise, and dugong are occasionally reported. Mangrove monitor lizards (Varanus salvator) are common, and the estuarine waters support saltwater crocodiles in small numbers. The park is on the East Asian–Australasian Flyway, and large numbers of migratory waders use the exposed mudflats between October and March.

The park's dominant vegetation is mangrove forest, with the most species-rich assemblages found in the tidal channels and estuaries. Principal mangrove species include Rhizophora apiculata, Avicennia alba, Sonneratia caseolaris, and Bruguiera gymnorhiza, forming multi-species stands up to 20 metres tall. The brackish transition zone between mangroves and freshwater forest supports nipa palm (Nypa fruticans) in dense stands along tidal channels. Inland, freshwater swamp forest with melaleuca (Melaleuca cajuputi) covers extensive areas. Sea grasses grow in the shallow subtidal zone. The mangroves are among the most structurally complex in Vietnam, with zonation corresponding to salinity gradients.

Mui Ca Mau is built entirely on Holocene sediments deposited over the last 6,000 years as the Mekong River delta prograded southward into the sea. The cape is actively accreting on its western Gulf of Thailand shore, with mudflats extending several kilometres into the shallow sea, while the eastern coast facing the South China Sea experiences erosion due to wave action and sediment starvation. The entire park is effectively at sea level, with elevations of 0–2 metres. Subsidence due to groundwater extraction in Ca Mau Province is accelerating coastal vulnerability. The seabed is shallow, extending 20–30 km before reaching depths of 10 metres.

The park experiences a tropical wet/dry climate. The northeast monsoon from November to April brings dry conditions, clear skies, and calmer seas. The southwest monsoon from May to October delivers 2,200–2,400 mm of annual rainfall, with rough seas and strong winds. The province is regularly affected by tropical storms and typhoons from June to November. Sea surface temperatures range from 27°C (winter) to 32°C (summer). The low-lying terrain makes the park extremely vulnerable to storm surge flooding during cyclones. Tidal fluctuations of 2–3 metres shape habitat conditions throughout the park.

Ca Mau Province was one of the last regions of Vietnam to be settled by lowland Kinh Vietnamese, with colonisation proceeding through the 18th and 19th centuries as settlers pushed south through the Mekong Delta. The mangroves were historically exploited for charcoal production, tannin extraction from the bark, and timber for local construction. During the Vietnam War, the Ca Mau mangroves were a stronghold for the Viet Cong, sheltered by the impenetrable maze of water channels. The U.S. military sprayed an estimated 40% of the Mekong Delta mangroves with Agent Orange between 1961 and 1971, destroying vast areas.

Mui Ca Mau National Park was established in 2003 by Decision No. 03/2003/QD-TTg. Prior to this, the area was managed as a state forest enterprise for sustainable timber and non-timber forest product extraction. UNESCO designated the Ca Mau Biosphere Reserve in 2009, recognising the park's role within a broader landscape of mangrove forests, aquaculture zones, and fishing communities. The cape (Mui Ca Mau) itself has been a protected landmark for longer, as the symbolically significant southern tip of the country. Restoration of Agent Orange-damaged mangrove areas began in the 1980s and has continued with international support.

The Ca Mau Cape monument and observation tower are accessible by boat from Ca Mau City, with the final approach through dense mangrove channels navigated on small motorboats. The iconic signpost marking the southernmost point of Vietnam is a popular photographic destination. Boat trips through the mangrove waterways reveal the scale and density of the forest, with opportunities to observe monitor lizards, fishing eagles, and kingfishers. The Park Ecolodge near the cape offers overnight stays with guided mangrove walks at low tide. Mud flat walking on the accreting western shore at very low tide exposes unusual mudskipper and mudcrab habitats.

Ca Mau City, the provincial capital, is reached by air from Ho Chi Minh City (1 hour), by bus (8 hours), or by Mekong River ferry services. From Ca Mau City, speedboat services run to the national park cape area (2 hours). Alternatively, a road and bridge route now reaches within 30 km of the cape, reducing boat journey time. Accommodation at the cape is limited to the park ecolodge; the majority of visitors base themselves in Ca Mau City. Local tourism operators in Ca Mau arrange full-day and overnight mangrove tours. The dry season from November to April provides the calmest conditions for boat travel.

Mui Ca Mau's primary threats are sea-level rise, increased storm intensity from climate change, illegal shrimp farming within park boundaries, and overfishing of the adjacent coastal waters. Erosion of the eastern shoreline has accelerated due to reduced Mekong sediment flows from upstream dams. Mangrove restoration projects have planted millions of trees, though restoration success rates vary with planting location and species selection. A moratorium on new shrimp ponds within the park has been enforced but is difficult to monitor across the vast waterway network. Sustainable eco-fisheries and certified mangrove shrimp aquaculture are being promoted as economic alternatives for buffer zone communities.