The book examines special phenomena that accompany cavitation. Includes such subjects as the changing of thermophysical properties, the effect of a cavitating fluid on solid surfaces, electrization of a fluid in various external conditions (except for the trivial external electric field influence, of course), the light emission from a cavitating liquid. The book provides, the definition of cavitation and its everyday appearance, the examples of cavitation and its applications, the description of cavitation through physical hydrodynamics and the chemical processes accompanying it