The architecture office heri&salli from Vienna conceived a steel structure similar to a cocoon round aswimming pool in the garden of a private builder-owner in Austria. With mounted panels and interiorconstructions which are more or less depending on their function the parametric organized spatialelement describes possibilities of a usable and experienceable surface.Proceeding from the task to redefine an existing garden property with view of the lake, andsimultaneously create provisions on views and a demarcation in direction of the surrounding propertiesan neighbors the theme of the classic rustic fence was taken up. In the simplest case a fence functionsas protection or demarcation, a visualization of a line that wasn’t visible before. In the further contest itserves as esthetic element or a representative sign and separates as a 2-dimensional element differentareas. We formulate the fence based on different requirements as a 3-dimensional description of anexisting garden. The fence itself becomes- proceeding from a diagonal constructional arrangementthereforea possibility of space. With this in mind it doesn’t demarcate the space, but creates it andrenders it experienceable , the function as a demarcation slides into the background and is only abyproduct.The objective of the opening element similar to a cocoon is to create different spatial qualities andexperience space. Partly covered, withdrawn and protected, then opening and finally in the middle or inthe end in the water of the pool where you can swim out of it. The curves convey a feeling of vastnessmakethe space bigger than it is-and create in the inside of the house an optimal resonant behavior.Different integrated constructions like stairs, seats, lying areas or a table with backrest and poolcovering are in its definition in a geometrical relation with the original construction; they emerge only tobecome part of the structure again. The integrated panels follow a dynamic course from the orthogonaledge into the described space, to develop in the central parts in relation to the steel structure from theinside to the outside or to dissolve more and more along the vertical.In this case architecture is an accumulation of possibilities in a described space and creates only the edges for a vast land in between.