Klagenfurt

Klagenfurt needs 2 days: the historic center with the Lindwurm fountain, a mythological dragon that's the city's symbol, on one, and a day of beach and water sports on Lake Wörthersee, with Minimundus (a park of scale-model world landmarks) along the way, on the other. June-August brings the lake water to its warmest. It's mid-priced for Austria. Its Lake Wörthersee, with summer water temperatures exceeding 26°C thanks to underwater thermal springs uncommon at this latitude, made it Austria's most popular alpine summer destination, far above the average temperature of other alpine lakes.