Explore the rugged, high-altitude environment of Phia Oac - Phia Den National Park, a mountainous region in western Cao Bang province known for its rich biodiversity, cooler climate, and potential for trekking adventures. Centered around Phia Oac peak (nearly 2000m), this park offers a different landscape compared to the karst formations dominating eastern Cao Bang.

The park boasts diverse forest ecosystems, including rare coniferous and broadleaf species, providing habitat for numerous bird species and other wildlife. Its higher altitude means a cooler, often misty climate, creating a unique atmosphere. Scattered throughout the area are remnants of French colonial architecture, including ruined villas from a former hill station, adding a historical dimension to the natural landscape.

Visiting Phia Oac - Phia Den National Park appeals to nature lovers, bird watchers, and trekkers seeking experiences away from Cao Bang's main tourist routes. While infrastructure may be less developed than in other national parks, the opportunity to explore unique forest types, discover historical ruins, and enjoy the fresh mountain air makes it a rewarding destination for adventurous travelers looking to delve deeper into Cao Bang's natural heritage.