In 1965 an observatory was built atop the old stone lookout tower amid the broad woodlands of the Kreuzbergl in Klagenfurt. From its viewing platform, the observatory offers unforgettable panoramic views of Klagenfurt and the surrounding mountains. With the help of a giant telescope and a modern astronomic navigation system, you will be able to gaze on live images of the moon, planets, binary stars and other unique features of the heavens. Parking is available at the Schweizer Haus or the Botanical Garden, with a clearly marked footpath (also lit up after dark) leading to the observatory.
https://www.visitklagenfurt.at/en/discover-and-experience/worth-seeing/292-sternwarte-klagenfurt.html