- Khao Yai National Park (Northeast): Thailand's oldest and most visited World Heritage Site supports an abundance of wildlife, from elephants and tigers to more than 300 species of birds. Hike along nature trails or camp out and hold a vigil in high watchtowers at night (the best time to see the nocturnal creatures in action).
- Ko Hong (near Krabi): Few can remain unmoved when they enter this seemingly unassailable limestone rock mid-ocean. At its center is a vivid green pool completely surrounded by what seems like a limestone donut. Majestic sea eagles hover above while tropical fish flounder about in the clear waters below.
- Ti Lor Su Waterfall (western edge of Central Plains): Thailand's biggest and most beautiful waterfall is hidden away near the Myanmar border, but it's well worth the trek to see it, especially at the end of the rainy season, in October/November.
- Doi Inthanon National Park (North): Drive to the top of Thailand (2,565m/8,415 ft.) and experience the odd sensation of shivering in the tropics. Go walking on well-marked nature trails, and look out for rare birds twittering in the trees. Hire a tent or a log cabin, and breathe deeply of the pine-scented air.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.