The park is the third largest in Thailand. It covers an area of 300 square kilometers, including tropical seasonal forests and grasslands. Its altitude mostly ranges from 400–1,000 m above sea level. There are 3,000 species of plants, 320 species of birds, and 67 species of mammals, recording in this, Thailand's most famous National Park.
I know it is extremely difficult to get ID on crabs, but maybe someone happens seen one similar and knows what it is. I saw this one south, maybe some 10-15km north of Haew Nerok Waterfall at Khao Yai..