The project shows the potential of the transition space, by mediating between the individual “the body” and their surroundings. A thesis critical of architecture based on perception and behaviour. The project is a case study located in the city centre of Rotterdam "Kruisplein area" to show the potential of a place in the city which is currently formalized by different forms, systems and relations. For this, a tapestry is introduced; "the ground undulation” to undo the static-ness and undulate the user. The project has the intention to create a more porous and paused environment by penetrating in the tapestry with architectural compositions, all having different objectives. This punctuations arise curiosity and trigger the body to make new relations with other bodies, the surroundings and its elements. The relation of the different scales in this project will contribute to the relation, experimentation and perception of the visitor, passenger and passer-by. – An architectural project of consciousness, unconsciousness, contingencies and perception