The legacy of the Third Baron Rayleigh (John William Strutt) is reflected in the association of his name with the Rayleigh distribution, the Rayleigh-Jeans law, Rayleigh scattering, the Rayleigh disc, Rayleigh waves, the Rayleigh criterion, the Rayleigh number, the Rayleigh-Taylor instability, the Rayleigh-Plesset equation, to mention just a few of his achievements. In addition, he was awarded the Nobel Prize in 1904 for the discovery of argon. The knowledge he gave to the world is still at work today in the design of optical instruments and antennae, in surface acoustic wave (SAW) devices, in seismology, in acoustics, and in studies of convection in fluids, atmospheric turbulence, ink-jet technology and solitary waves. His mathematical methods, developed principally to describe wave motion, are frequently used today by quantum theorists. The private laboratories developed and used by Lord Rayleigh are still extant at the family seat and provide a wonderful and unique insight into the life and work of this great Victorian scientist. Photographs of the laboratories and equipment contained therein will provide the background for a presentation on some of his contributions to science and their ongoing importance.