Khao Sam Roi Yot National Park's name means Mountains of 300 Peaks.

Take a boat to the white sand of Laem Sala and from there, hike the half-km to one of Thailand's most impressive caves, Tham Phraya Nakhon. Part of its high limestone ceiling collapsed long ago, allowing sunlight to illuminate a pavilion that was built inside the cave more than a century ago.

Other caves and a mangrove forest can be explored by boat from Bang Pu village, and on the west of the mountains is the largest wetland in Thailand, where a walkway offers glimpses of storks and collared kingfishers hunting in water covered with lotuses and purple water lilies. Back on the coast you might kayak to the island of Ko Kho Ram, home to a monkey troupe.