Situated in the national park of the same name, the 1,500m Erawan Waterfall is one of the most dazzling in Thailand, if not Asia. The park is located in the west of the country in the Tenasserim Hills in the Kanchanaburi Province. The seven-tiered cascade feeds into the Mae Nam Khwae Yai River and is named after the white elephant that carries the Hindu god Indra - the falls resemble the three-headed beast, known as Airavata in Hindi. There's a pool on each level with some being more suitable for swimming than others. It takes several hours to climb the 1.2 miles to the seventh tier and generally speaking it gets more challenging the higher up you go. The water, which falls over the limestone cliffs, is home to many fish although it is completely safe to swim with them. Elsewhere in the park, four fifths of whose 212 square metres are covered in deciduous forest, one can spot some magnificent wildlife including white-handed gibbons, crested serpent eagles, king cobras, greater brook carp and Siamese hares amongst others. There are also several caves to explore throughout the national park. Beware of travelling here during the Thai New Year as you risk being crowded out by locals who've travelled to celebrate at this natural wonder.