An observatory on the island of La Palma in the Canary Islands Group. The observatory site, regarded as one of the best in the world, is operated by the Instituto de Astrofisica de Canarias, which is host to a number of different organizations that have telescopes there, including the Royal Greenwich Observatory RGO. The RGO’s Isaac Newton Group consists of the William Herschel Telescope, the Jacobus Kapteyn Telescope and the Isaac Newton Telescope. Other instruments at the observatory include a Swedish solar telescope, a 2.56-metre 101-inch telescope belonging jointly to Sweden, Norway, Finland and Denmark the Nordic Telescope, or NOT and the Carlsberg meridian circle operated by Denmark, the UK and Spain. The observatory occupies an area of nearly two square kilometres at an altitude of 2,400 metres 7,900 feet.