As kids, most of us have dreamed of having a tree house as a safe haven and some of us still do. Interestingly, people in some countries don’t see tree houses as exotic, but as every-day parts of their lives. In New Guinea, for example, the Korowai people live in tree houses permanently. The raised homes help protect their food and belongings from animals and floods by keeping everything above ground level. Luckily, the tree house has become more than just a fairy tale-like hideout or an exotic living place in far-away lands. For those who seek to realize some of their greatest childhood dreams and are looking for a unique way to recharge and relax, architects and designers now offer some unbelievable tree houses and hotels for holidays. These have long outgrown the tradition wooden cabin concept, featuring multiple floors or even glass and mirror elements. Would you choose to spend a holiday or have a retreat up in a tree house?