Human beings were born in nature, breathe the air from nature, and we spend long times in it, forging an indissoluble bond with it. With the passage of time, the city where people live is gradually surrounded by constantly developing increasingly thickened building fabric. Over time, people adapt by living in places that are designed with various materials and spaces of different sizes, types and uses. The design intent of the Hidden Library is to enable an escape from the city, a respite from the density of the life of a city, to this library that is integrated in nature. The sometimes divisive walls of the city are evacuated, and the program of the library is integrated as a free plan, both in the design of the upper floors and the landscape in which the library is located. The landscape is not only part of free plan design, but also incorporates the raum plan design. Ideas of raum plan from the lower part of the library are extended to the landscape, in the form of five follies. These follies are organized according to the grid of the free plan and share the same textural properties of the raum plan elements. The five follies are also a hint of the raum plan, a hint to the raum plan world hidden under the plane. At the same plan, giving the entrants a feeling of picturesque and retreat from the density of urban life