Khlong Naka Wildlife Sanctuary is not just a typical protected forest, but part of the Lower Western Forest Complex, with strong ecological connectivity. Covering over 331,250 rai, the landscape features steep mountain ranges that serve as the source of several important waterways—most notably Khlong Naka. This stream flows from tropical rainforest through mangrove forests and into the Andaman Sea, creating a rare ecotone where terrestrial wildlife and coastal ecosystems meet.

The most significant highlight is its role as one of the last natural habitats of “Crinum thaianum” (Water Onion), a rare aquatic plant classified as Critically Endangered on the IUCN Red List. This species can only thrive in clear, fast-flowing streams with sandy and gravelly substrates. From October to December, its white flowers with golden-yellow stamens bloom across the water, releasing a delicate fragrance and creating a stunning natural phenomenon that attracts botanists from around the world.

The sanctuary is also home to a wide range of protected wildlife, including Malayan tapirs, barking deer, serow, and marbled cats. For birdwatchers, it is an important destination to spot several hornbill species such as the Oriental pied hornbill and the wreathed hornbill, as well as the blue-naped sunbird. These species reflect the richness of the lowland evergreen forest, which remains largely pristine.

A key highlight of visiting Khlong Naka is the “bamboo rafting experience,” managed by the local community enterprise in Naka Subdistrict. Tourism here emphasizes minimal environmental impact. Visitors drift along the stream on traditional bamboo rafts guided by experienced locals, while learning about the community’s efforts to protect the area from past threats such as mining and dredging. A visit here is not only a peaceful retreat into nature, but also a meaningful way to support sustainable conservation.

• Visit between October–December, especially November, to see “Crinum thaianum” in full bloom

• Contact the local community in advance for bamboo rafting arrangements

• Wear breathable clothing, non-slip shoes, and bring insect repellent

• Avoid loud noise and do not disturb wildlife to help preserve the ecosystem

• Bring drinking water and essentials, as facilities inside the area are limited