By the looks of this two-story resting spot, treehouses are also adult-friendly. With an elongated terrace attached to a sturdy trunk of a Hemlock Spruce and metallic rods plunged into the depths of the beneath waters, the Treehouse Solling in Uslar, Germany is fully immersed in the outdoors, steadily suspended above a pond. While the wooden interior is minimally furnished with only essential seating, the painted exterior is a bit more intricate. The parabolic façade features a myriad of windows to provide multiple viewing angles of the surrounding nature and wildlife. An escape from the stresses of urban living, this home successfully engulfs its occupants into the simple pleasures that nature has to offer.