City wellness hotel Nautilus is a project situated in city Nitra nearby the river with a same name all on the Nábrežie mládeže. The shape of the design concept refers to prediploma project and its final version, when was the main goal to join together two pasive and non attractive river banks and make this area active, full of aesthetics, sport and culture possibilities. It was also necessary to design a structure corresponding with surrounding hexagonal building, so that was the way, how the main shape of the hotel starts and was given a name Nautilus. Philosophy of the hotel was similarity with water ammonite, which with its colours contribute to whole revitalisation of tha area. Cascade mass and harmony with constant hexagon were able to the building many interesting views and split hotel on two service aggregates, part of services and accommodation to knot with nearby river.The main service of the Nautilus is wellness which is the part of its title. Moreover there is situated a conference hall and large restaurant with terraces. Final height of the structure is not disharmonical to the ambient and copies level of the highest trees