It is located in the reserve under the name «Huilo Huilo» I'm sure many now smile on your face =)
Shape in the form of a volcano was chosen specifically because of the suites can be seen the top of this volcano Arenal. It is built of stone and wood, and can only get inside by a suspension bridge. On the very top of the home streams cascade down instead of lava.
Accommodation is certainly not cheap, but I like the idea)