The Montana Magica hotel in Huilo Huilo, Chile, is a hotel built inside a man-made volcano, spewing water, luckily, instead of lava. Built in the middle of Chile’s Huilo-Huilo biological reserve, you can spot pumas, deer, and other wildlife while soaking in your private outdoor hot tub carved from the trunks of local, giant trees. COOL! (source)
Wow! That is so neat looking!