The Can Gio Mangrove Biosphere Reserve shelters 75,000 hectares of tidal forest, the largest contiguous mangrove system in Southeast Asia and a UNESCO-designated reserve since 2000. Thirty kilometers of wooden boardwalks thread through the pneumatophore thickets, built to protect the substrate while allowing foot access to a landscape that spent two decades recovering from wartime defoliation. By 1985, coordinated replanting had restored enough canopy for long-tailed macaques to reclaim the interior islands, and today more than 140 primates occupy the forest fragments around Monkey Island. The crocodile farm began in 1989 as a conservation nursery for Siamese crocodiles displaced by habitat loss across the Mekong Delta. The facility now holds over 800 individuals across breeding ponds and naturalistic enclosures, part of a regional captive program coordinated with Thailand and Cambodia. Visitors walk elevated platforms above the water, watching hatchlings bask on mud banks and adults glide beneath the surface. The farm's educational center displays growth charts, dietary studies, and satellite telemetry maps tracking wild populations in adjacent tidal channels. Can Gio trek Monkey Island & crocodile farm tours typically combine both sites in a single day loop, departing Ho Chi Minh City at dawn and returning by mid-afternoon. The monkey sanctuary occupies a five-hectare island reached by ferry; macaques approach the boardwalks freely, habituated to human presence but not fed by staff. Guide briefings emphasize no-touch protocols and secure bag closures. The forest canopy provides continuous shade, and observation decks overlook nesting colonies of painted storks and grey herons that share the island's tallest mangroves. The biosphere reserve doubles as a working landscape: shrimp ponds and oyster racks line the outer channels, and fishing cooperatives harvest mud crabs under seasonal quotas. Interpretive signs along the main trail explain the mangrove root system's role in carbon sequestration and storm surge attenuation, functions that earned Can Gio status as a Ramsar Wetland of International Importance in 2012. The reserve's core zone remains off-limits to visitors, protecting nesting grounds for the critically endangered milky stork and habitat corridors linking Can Gio to the Dong Nai estuary.