Tubohotel is one of the world´s most unique hotels, it is located in Tepoztlan, Morelos, Mexico. The hotel designed by Architect studio T3arc uses recycled concrete pipes for hotel rooms. The owner wanted to build a fast, inexpensive, eco-friendly, and affordable hotel, it features 20 rooms with beautiful panoramic views of the surrounding unique and natural environment . The rooms are stacked in pyramids of three tubes to harness the ground as much as possible. You can stay at Tubohotel for around $43 per night.