Thap Lan National Park

Thap Lan National Park is Thailand's second-largest national park, covering about 2,236 square kilometres across Prachinburi, Nakhon Ratchasima, Buriram and Sa Kaeo provinces, with its headquarters in Na Di District, Prachinburi. Established in 1981, it protects the world's largest remaining forest of Lan or fan palm (Corypha lecomtei) and forms part of the Dong Phayayen-Khao Yai Forest Complex UNESCO World Heritage Site, known for diverse wildlife, reservoirs and waterfalls.

Visitors can expect a vast lowland and hill forest landscape dominated by Lan palm groves, mixed deciduous and evergreen forest, reservoirs and seasonal waterfalls. The park offers viewpoints, nature trails, birdwatching and wildlife observation areas, camping grounds and bungalows near the headquarters. Facilities are basic and spread out, with driving required between attractions such as Bo Thong Waterfall, Lam Mun Bon Reservoir and forest viewpoints.

Established on 23 December 1981 as Thailand's 40th national park, covering 2,236 sq km. In 2005 it became part of the Dong Phayayen-Khao Yai Forest Complex inscribed as a UNESCO World Heritage Site for its outstanding biodiversity and conservation value.

The park is named after the Lan palm (Corypha lecomtei), whose leaves were traditionally used for making palm-leaf manuscripts and roofing. The forest has long been valued by local communities for non-timber forest products and is now protected as a key conservation and nature education site.