Subterranean Workshop For Building Beach-Street-Converters Showing work in a glass showcase on the beach of the island Fanø is a difficult task. Luckily, an exiting discovery was made. Under the sand, activists had installed a secret workshop, in order to build a large machine that is capable of converting streets into beaches. The Subterranean Workshop can be seen through a periscope, which is the only part of the building visible on ground level. The Periscope was covered with the glass showcase and declared art.