Indonesia
Kaliandra is the most fabulous place, 21 hectares of forest, paths and hidden statues with four different levels of accommodation. It runs social and environmental programmes and does tours to support its work. The people are charming, the food (Javanese) is great, there's a high ropes course and mountain bikes for hire, there are hiking trails - and you can round it all off with a massage. Or have a more relaxing time learning the gamelan, or batik, or yoga - it's a gem. It's actually about 12 kms from Tretes but pretty easy to get to - one and a half hours from Surabaya, an hour from Malang.