Felsenegg-Girstel TV-tower, Broadcasting tower in Zürich, Switzerland.

The Felsenegg-Girstel TV-tower stands 73 meters tall near the mountain station of the Felseneggbahn with a four-legged steel lattice structure rising above the landscape. All technical equipment is housed underground, leaving the tower itself as a purely functional broadcasting antenna without any interior space.

The original installation was built in 1963 following designs by architect Edwin Schoch and served telephone and broadcasting transmission for decades. It was replaced in 2021 with a modern structure meeting current technological demands.

The tower's official PTT name was Albis, abbreviated ALBS, and its control centre converted signals between the different standards of the Eurovision TV region, linking many private Swiss stations to national and international networks. From Felsenegg the REAL system (Rechner Albis) remotely controlled antennas on 27 other Swisscom towers. Until 10 December 2009 it broadcast Radio Zürisee on FM before that station moved to the Üetliberg.

The broadcasting tower sits near the mountain station accessible via the Felseneggbahn cable car, which connects easily to Zürich through public transportation. The structure itself is not open to the public and functions solely as a transmission facility.

What makes this structure stand out is that it has no interior space whatsoever - all technical systems are completely buried underground. This innovative approach allows the antenna to transmit VHF, DAB+, and Internet of Things signals while keeping the visible structure purely functional and uncluttered.