Kastellbakken
Norway
Kastellbakken (later renamed into Husebybakken) is an abandoned, but first modern ski jumping hill in history, opened in 1879. It was located at Ullern in Oslo, Norway. It was the venue of Husebyrennet, Norway's and the world's most prestigious Nordic skiing tournament between 1879 and 1891. Due to lack of snow, there were no events in 1880 and 1882.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).