Cascata Lequarci, Natural waterfall in Ulassai, Italy.

Cascata Lequarci is a waterfall near Ulassai in eastern Sardinia where water plunges down a tall rocky face. The water flows over limestone formations and divides into multiple streams as it descends.

The sources record no formation history for the falls; they document only the present setting. The Rio Lequarci gathers water from the Baulassa and Martalaussai plateaus and drops about 50 m over a limestone cliff roughly 70 m wide, then descends a further 75 m into small lakes. Flow depends on upstream rain, and the falls are observable only during periods of heavy precipitation.

The falls are fed by the Rio Lequarci, which drains the Baulassa and Martalaussai plateaus above Santa Barbara, a locality of Ulassai. Because the flow depends on rainfall upstream, the width of the falling front shrinks markedly in spring and summer, and the French sources note the falls can only be seen during periods of heavy rain.

The waterfall is reached by a marked path from Ulassai village, which is straightforward to follow. The best time to visit is after rainfall or during wetter months when water flow is at its strongest.

The waterfall changes dramatically in appearance depending on the season and rainfall. During dry periods it becomes thin threads of water that flow down the rock face like delicate strands.