This project, located in the arboretum of Incheon Grand Park, forces on what architectural intervention enables people to experience wood not through a typical exhibit. Accordingly architecture itself became an exhibit for wood experience where we can diversely sense wood through seeing, smelling, hearing, touching with architectural ambiance temporally and spatially harmonizing with outside forest. Architectural abstraction was put into this project, which sunlight between leaves falls down and moves depending on wind via the Ambience Wall (interactive wood apparatus). This enables visitors to have multi-sensory experience of wood in diverse architectural levels reflecting the variation of forest hour by hour. The Ambiance Wall (Height 4m * length 30m) creates real-time ambiance through parameters reflecting human activities and micro-weather around this building. This can generate the interaction between people and architecture, and communication between inner and outer space. We can expand our spatial experience via real-time situations in this space generated by the Ambience Wall, which is Situational Architecture. The creative and innovative expansion of spatial experience can contribute a new awareness and culture for wood. It gives us the inspiration in our life through touching our imagination for wood and the nature.