The sports swimming complex for 6,000 spectators forms a new centre of attraction in the Primorsky District of St. Petersburg — at the intersection of Dolgoozyornaya and Parashyutnaya Streets, by Lake Dolgoe Park. The building becomes the core of an emerging sports cluster. The image of the project is the “house-pipe”: it is born from a simple and obvious analogy — water flows through a pipe. The building repeats this logic, gathering itself into an elongated, directional volume in which movement becomes the principal principle of organisation. The main volume is raised on stilts, freeing the ground level for a through-passage and allowing routes to slide under the building without interruption, while space flows from the park into the city and back again. The internal structure follows the same logic: functions and flows are arranged along a single direction, without being broken into isolated fragments, which sets a sequential organisation of space and fixes the interrelationship between the sports programme, the spectator zones and the open territory.