Säntis transmitter, Communications tower at Säntis mountain peak, Switzerland

The Säntis transmitter is a 123.55-metre reinforced-concrete tower on the 2,501-metre Säntis summit, standing on Wildhaus territory. Its fibreglass-reinforced plastic antenna cladding can be heated to keep ice from falling onto the visitor terrace below. The mast foot measures 5.49 metres across and the tower tip 1.82 metres, with a total weight of 4,164 tonnes.

Telecommunications at this location started in 1955 with a wooden antenna structure that met early broadcasting needs. The current tower was built in 1997 to replace the older installation with a more modern and efficient facility.

The tower stands on Säntis at 2,501 m, on ground shared by the municipalities of Hundwil, Schwende-Rüte and Wildhaus, though the structure itself lies in Wildhaus. Its heated, glass-fibre-reinforced plastic antenna casing melts falling ice so it does not drop onto the visitor terrace below.

The tower stands next to the Schwägalp–Säntis cable car's mountain station, on Wildhaus territory; the summit lies in the municipalities of Hundwil, Schwende-Rüte and Wildhaus. The tower is normally closed to the public, though guided tours are possible by prior arrangement. Only the 84-metre antenna section rises above the summit height, keeping the view unobstructed in all directions.

The tower is struck by lightning more than 100 times each year, making it one of Switzerland's most frequently lightning-struck structures. This extreme exposure reveals just how vulnerable the peak location is to atmospheric electricity.