ANNA Cabin, designed by architect Caspar Schols, puts a fresh and intriguing spin on the classic wooden cabin. At first glance, ANNA appears deceptively simple with its metal gable roof, simple wood construction, and terrace. However, ANNA’s walls -- both the outer wood shell and the inner glass -- slide open and closed on four rails, allowing it to expand and contract. When the weather is warmer, the shells can glide open to provide more light and ventilation. In cooler temperatures, the cabin walls can be closed to provide shelter and warmth.