Hochosterwitz Castle (map). One of the most impressive medieval castles in Austria, dating back to the 9th century, is 20 km outside of town. This rock castle stands on a dolomite rock towering 175 m above everything else, and is considered a landmark for the entire Carinthia state.
In summer, the city is home to the Altstadtzauber (The Magic of the Old City) festival.
Lindwurm, Neuer Platz (map). The lindworm is the town’s landmark. According to a legend, an evil dragon infested the region where Klagenfurt is located today. The duke of Karnburg promised land to those who would catch and kill the dragon. Eventually a group of menials achieved the killing of the dragon by a trick. (In Old Slovene, cviljovec is a place haunted by such a wailing female ghost or cvilya)
Minimundus (map) open from April to October. This park offers a huge collection of miniature models of famous buildings from many countries in the world.
The centre of the city (around Alter Platz, map) offers a large variety of boutiques, book shops and perfumeries. Stalls serve traditional Austrian cuisine in the indoor part of Klagenfurt’s market.
Most sights of interest can be easily reached by foot. Klagenfurt offers an extensive bus network. The main bus hub is at Heiligengeistplatz (map) in the centre of the city.
Also сheck оut мore info about Klagenfurt: Wikipedia • Wikivoyage