One of the specific features of the Retezat mountains is the widespread presence of glacier lakes. Approximately 38% of the glacier lakes of Romania are found here, on the bottom of calderas, grouped in lake clusters or isolated, and are one of the biggest tourist attraction of the park. Within the massiff limits, there are 58 permanent glacier lakes, between 1700 m and 2300 m. Some sources mention over 80 lakes, but here are most likely included the temporary ones as well.