TREKKING What could be more romantic for overseas visitor than exploring Thailand's spectacular jungles on the back of a mighty elephant. For those who have only ever seen an elephant in a zoo, elephant trekking and camping under the starts is a dream activity of getting back to nature. Watching from the elephant's back going down a mountain could be a bit scary, but this great sense of adventure is fun too. For trekking, mountain hiking and hilltribe culture: The mountains of Chiang Mai, Chiang Rai, Mae Hong Son and the forest land on the Westem border with Myanmar, in Tak and Kanchanaburi. For animal spotting and bird watching: Khao Yai to the North of Bangkok, Doi Inthanon in Chiang Mai and other wildlife sanctuaries around the country. - Doi Inthanon National Park The area around Thailand's highest mountain is popular because of its extensive network of trails. - Phu Kradung The northeastern province of Loei has long been popular with campers and hikers. - Khao Yai National Park Close to Bangkok, this largest of all Thailand's nature reserves has many established trails which take hikers through a combination of tropical forest, scrubland and up several steep hills. - Khao Sok National Park Set in Surat Thani Province. this park has waterfalls, caves and a huge reservoir dotted with over 10 small island.