Than Rattana Waterfall

Than Rattana Waterfall is a forest waterfall located just inside Khao Yai National Park in Hin Tang Subdistrict, Pak Phli District, Nakhon Nayok Province. Situated near the park's Nakhon Nayok entrance checkpoint, it is one of the most accessible waterfalls in the park. The waterfall features a small cascade flowing over rock formations surrounded by dense forest and is notable for easy access, seasonal flow and its location within Thailand's first national park.

Visitors can expect a small, easily accessible forest waterfall set within Khao Yai National Park near the main road from Nakhon Nayok. The site consists of a cascade flowing over broad rock slabs into shallow pools surrounded by tropical forest. A short walk from the parking area leads to viewing areas and pools where wading and swimming are often possible when water levels permit. The area includes basic visitor facilities and is typically visited as a short stop while exploring the national park.

Located within Khao Yai National Park, established in 1962 as Thailand's first national park. The park and its waterfalls are part of the country's early national park system for forest conservation.

Part of the Dong Phayayen-Khao Yai Forest Complex, inscribed as a UNESCO World Heritage Site for its natural significance. The waterfall is a well-known recreational natural attraction for Thai visitors within the protected forest area.