The Seven Rila Lakes are a group of lakes of glacial origin , situated in the northwestern Rila Mountains in Bulgaria. They are the most visited group of lakes in Bulgaria. The lakes are situated between 2,100 and 2,500 metres elevation above sea level. They are a main tourist attraction in Bulgaria because of the inspiring natural beauty of the place. The lakes are located one above the other and are connected by small streams, which form tiny waterfalls and cascades. The most appropriate time to visit the lakes is summer, in July and August, when temperature is above 10 degrees Celsius and the risk of sudden storms is lower.