HubbleSite News Center: Gravitational Lenses
http://hubblesite.org/newscenter/archive/releases/exotic/gravitational-lens/List of images taken by the Hubble Space Telescope of Gravitational Lenses (including the famous Einstein Cross picture); updated continually.
Submitted in section: Physics: Relativity: Gravitational Lensing: HubbleSite News Center: Gravitational Lenses