At 2,502.9 metres above sea level, Säntis is the highest mountain in the Alpstein massif of northeastern Switzerland. The mountain is a highly visible landmark thanks to its exposed northerly position within the Alpstein massif. As a consequence, houses called Säntisblick (English: Säntis view) can be found in regions as far away as the Black Forest in Germany. The panorama from the summit is spectacular. Six countries can be seen if the weather allows: Switzerland, Germany, Austria, Liechtenstein, France, and Italy.
Säntis is located in the Alpstein region, nearly 10 km (as the crow flies) southwest of the town of Appenzell. Three cantons meet on Säntis: Appenzell Ausserrhoden, Appenzell Innerrhoden, and St. Gallen, the mountain being split between the municipalities of Hundwil, Schwende and Wildhaus-Alt St. Johann. Even though its summit is at only 2502 metres above sea level, the mountain ranks number 12th in the Alps and 29th in Europe in topographic prominence at 2021 metres. Peaks with high prominence often have impressive summit views, even if their elevations are relatively modest, Säntis being a prime example.