Both specialists and tourists are cataloguing this karst phenomenon as the most spectacular in Romania. The 300 m (1,000 feet) height of the walls is hard to perceive, until the eye manages to identify the pine trees suspended on the slope.
The three major karst sinks, generically called Sink 1, 2 and 3, represent the point where Valea Cetăţilor (Valley of the Fortresses) disappears in the underground, but also the resurfacing point of the waters captured in the Căput cave and the losses of Ponor Meadow. The first two sinks are connected to each other through a huge portal, about 70 m (230 ft) high, and at their basis, a noisy waterfall betrays the location where the waters of Căput cave are heading toward the cave of Cetăţile Ponorului (Sinkhole’s Fortresses).
The Blue-Dot touristic track represents a circuit going over Sink 2 and Sink 3, eventually moving up to the wooden balconies suspended above them, but the level difference makes this touristic trail to be tiresome and dangerous. Also, in the high area, there are no water sources.