Lake Ariana

42.689549°N 23.336881°E / 42.689549; 23.336881 Ariana (Bulgarian: Ариана) is the name of an artificial lake in Knyaz Boris's Garden in Sofia, Bulgaria. It is B-shaped, 175 m long and 75 m wide, with a small island at its narrowest point. It is located at the northernmost corner of the park, in the city centre, between the Eagles' Bridge and the Vasil Levski national stadium.

The lake was constructed in the late 19th century and has since been a focal point for leisurely walks by Sofianites. Water wheels and rowing boats have been a feature, and in winter it was frequently known to freeze over and for people to ice-skate on its surface, nowadays an activity which serviced by several organized ice skating rinks in and around the lake.