This publication is about quantum mechanics and about real phenomena hidden by the formalism of quantum mechanics. Quantum mechanics assumes the existence of quantum waves and superposition states. However, the existence of these cannot be experimentally demonstrated. A new way to explain formation of the interference fringes created by particles without assuming the existence of quantum waves is used to reveal the origin of Bohr’s philosophy and the Copenhagen interpretation of quantum mechanics. This new approach is also used to show that EPR, delayed choice, quantum eraser and which-way experiments do not test quantum mechanics adequately. The presented text gives an approach how to look at quantum mechanics and see beyond its formalism. This gives ideas for new tests. The publication is directed to researchers interested in fundamentals of quantum mechanics but also to all physicists who can appreciate mystery and strangeness of this theory.