The Sphinx Observatory is an astronomical observatory located above the Jungfraujoch in Switzerland. It is named after the Sphinx, a rocky summit on which it is located. At above mean sea level, it is one of the highest observatories in the world. Accessible to the public, it is also the second highest observation deck in Switzerland. The mountain top has been tunneled to fit an elevator which ascends to the observatory from the Jungfraujoch railway station, the highest such train station in Europe.