Kaeng Krachan National Park

Kaeng Krachan National Park, Thailand's largest protected area at 2,915 square kilometers, spans misty mountains that host over 400 bird species, including the rare hornbill. Its avian diversity is 50% higher than the average Thai park, with trails like Phanoen Thung (13.5 km) offering sightings of wild elephants and gibbons. While Mu Ko Similan excels underwater, Kaeng Krachan leads terrestrially, surpassing #6 Mu Ko Ang Thong in mammal species count by 30%. Hikers report 8-10 sightings per day during the cool season, a rate unmatched by any other mountain park on this list.