Climbing 'Projekt Po Kýlu' on Sfinga, a classic test piece nestled within the dramatic sandstone towers of Adršpach/Teplice Rocks, is an unforgettable experience. Typically graded around IXc (Czech grading system) or 7c/7c+ (French), this athletic route tackles a prominent, overhanging keel-like arête. It demands exceptional finger strength, precise footwork, and often a cool head due to the unique, sometimes damp, nature of the sandstone. Conquering 'Projekt Po Kýlu' is a significant achievement for any climber visiting the region, offering not only a challenging physical and mental battle but also breathtaking views and a deep connection with the raw beauty of the Czech sandstone.