Whether you need to work off that Christmas lunch, or get away from panic-buying gifts for a couple of hours, there are plenty of spots to enjoy a leisurely walk and soak up some nature. Thailand has a wealth of national parks, where you can take a gentle stroll or indulge in some trekking or a host of other activities, including rafting and rock-climbing. Or why not charter a boat for the day and celebrate Christmas surrounded by Thailand’s beautiful marine life?