Through Irish history, different spiritual demands in specific historical moments impacts on the legends of Hy-Brasil. In turn, the stories of Hy-Brasil reflects the history of Ireland through its possible position, appearances, items events, viewpoints gateways and monuments. The project is to use the history of Hy-Brasil, a mystical island of Ireland, to explore the architecture of myth, which are expected to be triggered and formed by the current situation of Ireland. It looks to design a pragmatic space by providing a gateway to the mythic island of Hy-Brasil. Siting on the north end the Ireland, the Lough Foyle in Donegal, the project constructs an architectural artifact out of a particular strata of Ireland’s specific geology and monumental landscape to take people into the imagination and expectation of perceive the Irish mythology.