Phu Langka National Park

Phu Langka National Park is a protected area spanning Bueng Khong Long District in Bueng Kan Province and Ban Phaeng District in Nakhon Phanom Province in northeastern Thailand. Established on 23 December 2009, it covers about 50 square kilometers of sandstone mountains, dry evergreen and mixed deciduous forest. The park is notable for Tham Naga cave with scale-like rock formations, viewpoints such as Chedi Kong Khao, and seasonal waterfalls including Tat Kham and Tat Pho.

Visitors can expect a forested sandstone mountain landscape with marked hiking trails, viewpoints, waterfalls and cave sites. The main attraction is the ascent to Tham Naga cave to see the distinctive undulating rock surface resembling Naga scales, along with nearby Tham Naga Noi and other rock formations. Trails are steep with stairs and ladders in sections, passing through forest to cliff-top viewpoints overlooking Bueng Khong Long and the Mekong lowlands. Facilities are basic and centered at the park headquarters and trailheads.