Fernmeldeturm Ober-Olm, Radio transmission tower in Ober-Olm, Germany.

Fernmeldeturm Ober-Olm is a concrete transmission tower that rises 108.35 meters (355 feet) above ground and sits at an elevation of 255 meters (837 feet) above sea level. The structure broadcasts radio and communications signals across the surrounding region.

The tower was constructed in 1966 at an initial height of 70.35 meters (231 feet) to broadcast radio and communications signals to the region. A major extension was completed in 1990 to increase the structure to its current height and accommodate modern transmission needs.

Locals call the tower "Olmi" or "Ober-Olmer Spargel" (Ober-Olm asparagus), a reference to its tall, slender shape and to the white asparagus grown in the fields around Ober-Olm and Essenheim. The nickname is used in everyday speech rather than on official maps, where the site appears as Funkübertragungsstelle Mainz 3.

The tower stands between Ober-Olm and Essenheim in the Mainz-Bingen district; there is no public access to the structure itself, so it is seen from the surrounding villages and roads. FM broadcasts began on 100.6 MHz in October 1990 and on 104.5 MHz in December 1991.

The structure maintains eleven separate directional radio connections that allow communication signals to be transmitted in multiple directions simultaneously. This technical setup makes it a key hub for communication across wide areas.