In the South, the narrow, peninsula  of Prachuab Khiri Khan and its neighbour Phetchaburi offer an attracitive mountain and sea combination. Within their parameter, they contain the twin beach resorts of Hua Hin and Cha-am, and two large havens for wildlife, Sam Roi Yot and Kaeng Krachan National Parks. SamRoi Yot (Three Hundred Peaks) National Park has sandy beaches, caves and mangrove forests and provides a home for 300 species of birds. Kaeng Krachan is the largest national park. Its birdlife includes  250 species, among them the great hornbill and the grey peacock. Kaeng Krachan also offers abundant hiking delights wildlife, birds and lush jungle along the trail to Tho Tip Waterfall, which takes about three hours.