At 3000 sq km, Thailand’s largest national park is home to the stunning Pa La-U waterfalls, and includes long-distance hiking trails that snake through forests and savannah-like grasslands, past cliffs, caves and mountains. Two rivers, Mae Nam Phetchaburi and Mae Nam Pranburi, a large lake and abundant rainfall keep the place green year-round. Animal life includes wild elephants, deer, tigers, bears, gibbons, boars, hornbills, dusky langurs, gaurs, wild cattle and 400 species of birds.