IAC: The Instituto de Astrofisica de Canarias. The Autonomous Robotic Telescope is located at the IAC's Observatory del Teide site.
Royal Observatory, Greenwich: This is where East meets West on the International Dateline. It is a really good place to visit if you are in London. The web site is also really good with lots of useful current Astronomical information.
Night Sky Info: Weekly information about the night sky, astronomy articles and observations.