Elephant Nature Park, Chiang Mai, Thailand - a haven for elephants rescued from abusive situations. If you are interested in ethical travel, you may wish to research the elephant situation in Thailand before deciding to ride one.
Khao Sok National Park in south Thailand (near Phuket, Krabi, Khao Lak) boasts a spectacular landscape of limestone rock formations and ancient rainforest and can be best explored by boat or kayak or on foot (jungle treks). You can stay in tree houses and floating huts on a lake, or try glamping in luxury safari tents at Elephant Hills camp. (Black Dots White Spots travel blog)