Sea Cube began with the question as to exactly what lies beneath grand nature, which meets the horizon and makes up the seashore, and is thus unfathomable in its entirety by the human sight. This project involved burying a 3m cube in the sand, filled with sea water and covered with a transparent plate.The mass of a structure is generally described through the measurement of its width, length, and height, but a sense of presence realized by filling it with sea water escapes such numerical description. This work is a kind of experiment which questions whether material mass can be converted into presence. The geometric traces created on the atypical curves of nature conveys, at least momentarily, a heterogeneous presence to the audience. However, many of the human traces accumulated from time immemorial are eventually absorbed into nature and returned to the landscape of Mother Nature. And this natural flow will continue to repeat itself right here and now, presenting a unique spectacle to the viewer.