Pertisau

Pertisau is a small village on the Achensee Lake in the Tyrol region of Austria.

It is located in the Karwendel Alpine Park, one of the oldest, cross-border, protected areas of the Eastern Alps.

The town was used by English school story writer Elinor M. Brent-Dyer as the first setting for her Chalet School series, under the fictionalised name of Briesau am Tiernsee; a plaque on the wall of the village bookshop commemorates her writings.

The village produces Tirolean mineral oil, an all-purpose tonic with a 100-year-old tradition of Tiroler Steinöl.

The town also has paragliding, kite-surfing, mountain biking, rafting, and diving, hiking, sailing, and cycling activities.