The Walkerhill Hotel Acadia is a representative of the urban resort hotel in Korea, located on the edge of building group of Walkerhill and has a comfortable atmosphere as though embraced by nature. In consideration of a skyline formed by Walkerhill Hotel and Sheraton Walkerhill Hotel, the new hotel was arranged to maintain its continuity. This formed an organic feeling as if hotel space overlaps with nature as the site stretching out horizontally and mountain ranges becoming a background of hotel unfold in the same sense of direction. The glass curtain wall was used to give transparent and light feeling as if rooms were floated on the ground of black granite (Machunsok) and silver aluminum sheet was applied for minimizing a sense of difference with nature so that the sky could be seen reflected. In this way, the effect which boundary becomes clouded, links and/or segments mass that consists of a space by the direction of light and change of climate to form an unfixed and changeable ‘Fluid Space’. Considering the gradient of the topography, mass structure of terraced-type arranged by gradual and multi-layered space was emphasized more on interpenetration into nature. Acadedia has the topographic condition of a typical location with mountain behind and water in front, which faces the Han River forward and joined along the foot of Mt. Acha behind. Therefore, Acadedia plays a part of leading the flow of a series of buildings on a hotel complex to make the urban context well-balanced with nature of the banks of Han River.