Dim light shines from the ceiling, the quarry stones of the side walls gleam damply. Every now and then, drops of water splash into small puddles at the edge of the asphalt road. No sound penetrates the dim tube: the Kückelheim tunnel is 689 meters long and is the highlight of the "SauerlandRadring".
Birdwatchers are thrilled by the bearded bat, the greater mouse-eared bat, the water bat and the brown long-eared bat that have already been spotted there. The animals were also the inspiration for the cycle path sign: a white cyclist in front of the red silhouette of a bat. The tunnel is open in 2021 from April 1 to around October 31.
For nature conservation reasons, the Kückelheim tunnel ("Fledermaustunnel") is closed from 01.11. to 09.04. at the latest.
Coming from Eslohe, the winter bypass is recommended during the closure period: Eslohe - Niedersalwey - Obersalwey - Schliprüthen - Fehrenbracht.
Coming from Finnentrop-Serkenrode, the following winter bypass is recommended: Fehrenbracht - Schliprüthen - Obersalwey - Niedersalwey - Eslohe.