GAD Editorial · Published · · English study · Chinese summary · Study dated 2026-10-06
A bath needs an edge, but that edge does more than contain water. It establishes where people pause, what they can see and how they move between being dressed, resting and swimming. Peter Zumthor's Therme Vals and White Arkitekter's Kastrup Sea Bath approach these questions with very different forms of enclosure. Reading them together shifts attention from the image of a pool to the space surrounding a person in the water.
At Vals, the operator identifies local quartzite as the defining surface material of Zumthor's thermal baths. The official Pritzker project photograph shows horizontal stone courses surrounding a pool beneath a ceiling punctuated by light gaps and smaller openings. These details give the bathing room a series of closely related scales: the course of stone beside a hand, the height of water against a wall and the line of daylight above.
The resulting architectural reading is intimate rather than purely monumental. The wall remains legible where it meets the water, so a surface normally seen from a standing position is encountered much closer to the body. Overhead light gives an enclosed room a connection to changing conditions outside without requiring every boundary to become transparent. This is an interpretation of the spatial arrangement, not a claim that all visitors experience the same mood.
Kastrup, completed in 2005, creates a more open bathing place off the Danish shore. White's project account describes a pier extending from a north-facing beach and curling into a south-facing enclosure. Its timber perimeter rises toward a diving platform, while a continuous bench provides places to stop along the route. The form is intended to shelter bathers from wind while keeping the facility outdoors.
Here the enclosure is also a route. Walking along the pier progressively changes the relationship to shore, sea and other visitors. The curved edge gathers people around an area of water, and the bench makes watching and waiting part of the same architectural figure as swimming. White also describes accessible changing facilities and ramps. These provisions belong to the design account; their present condition and suitability for an individual visit require current operator information.
The comparison exposes several meanings of openness. Kastrup is open to the sky but still has a deliberately protected interior. Vals can feel connected to natural light while remaining substantially enclosed. Neither can be explained simply by the amount of glass or by whether its water is indoors. Shelter, sightlines and the route back to dry ground have to be read separately.
For another bathing brief, draw the path of someone who wants to swim and someone who intends only to accompany them. Show where each can sit, look toward the water, change direction and leave. Then place the wind boundary, the visual boundary and the water boundary on that drawing. Their differences reveal how architecture can support a shared bathing place without assuming everyone wants the same degree of exposure.