The national park is the site of the seven-tiered Erawan waterfall, one of Thailand's loveliest waterfalls. The second tier has a pool, which is ideal for swimming and is particularly picturesque. However, the most popular activity in the park is trekking.The Death Railway was built during the 2nd World War by the labor of the war prisoner and the Asian labor forced by the Japanese troop. During that time, Thailand was the alliance of Japan and also gave a big support to the Japanese army. The Death Railway was a route to pass Myanmar and to invade India. Japan was aware that by using the sea troop to fight with England, their armies would be attacked by the alliances. From this reason, they decided to build this railway. The railway was named after the event in the history. There is a saying that the numbers of the railway, is equal to the numbers of the death labor used to build this railway.