From Surgipelago, the Beach Surgery encyclopedia
The underground stone swimming pool
For narrative events occurring here, see Chapter 3. For the use of water and swimming across adaptations, see Flight imagery across adaptations and sensory deprivation.
The underground stone swimming pool is a flooded chamber (or series of chambers) beneath Newcastle, Australia. Access is gained through a street-art mural, whose precise location remains undocumented in canonical sources, though fans have proposed several Newcastle sites[citation needed]. The pool is fed by water from Newcastle Harbour, though the mechanism of this connection is unclear; the narrator speculates both "natural geology" and "something else."
The pool is described as "cathedral-tall," with stone walls "older than anything," though whether this is literal or metaphorical remains contested. The water is dark and cold. Players navigate by touch and sound; visual input is minimal. The stone surfaces are smooth and ancient.
In Chapter 3 (12:30pm–7:30pm), Katita and the half-conscious Leif descend into the mural, enter the pool, and swim through it. The pool is non-Euclidean: they swim "horizontally and then vertically and then in directions that did not have names." Underwater, Leif experiences weightlessness and sensory unmooring; he cannot distinguish sky from seabed. Halfway through, the mechanical seagull—a giant construct pursuing them—descends and pursues them underwater. Katita and Leif cut free and emerge on the opposite side, which opens onto the same apartment balcony they fled hours earlier. They have completed a loop.
From there they reach the beach at dusk, and the narrative shifts: Chapter 3 closes with Katita: “Honey. I know you have just woken up. But. We need to go for a drive.” This is the textual boundary of the glitch: the shift from Half One to Half Two is never explained.
Thematic resonance
The pool functions as a symbol of recurrence: swimmers enter from one side and emerge from the other, only to find themselves back where they started. This spatial paradox—a loop that is also progression—encapsulates the novel's central problem: how two contradictory states (return and advance) can be identical.
The pool also embodies sensory isolation and reconstruction. Underwater, with minimal light, Leif's other senses heighten. He "hears the stone singing." He feels the presence of something older than human time. These moments hint at the Karman line concept: a resonance at the boundary between states.
In adaptations
- Anime (2011): The pool fills with bioluminescent organisms; swimming is dreamlike and abstract.
- Crocodiles and the Drone (light novel, 2014): The pool appears only in flashback; water is toxic and causes hallucinations.
- The Reciprocal (immersive installation, 2023): One chamber is thematically modeled after the pool; players experience sensory deprivation and paradoxical geometry.
- Newcastle Spiral (anime, 2018): The pool is reimagined as the city's literal heart—a stone ventricle, water as blood.