Ariana (Bulgarian: Ариана) is the name of an artificial lake in Knyaz Boris's Garden in Sofia, Bulgaria.

It is located at the northernmost corner of the park, in the city centre, between the Eagles' Bridge and the Vasil Levski national stadium.

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.

The "Ariana" beer hall was the property of the metropolitan municipality, which provided the businesses for rent under the condition that the tenant of the establishment would maintain the lake, as well as build facilities for the boats, ice skates, and other equipment used there.

[3] In the 30s, "Ariana" Beer Hall faced competition from the Proshekov brothers' "Deep Cellar" (Дълбок Зимник) and Grekov's "Red Crabs", however it appears that it was generally favored by the consumers of the day over them.