Also known as the Big Cave or Cave of the bathroom, it actually extends below the commune Ponoarele under the hills Brăzişori and Cornet, a distance of over 1,560 m in length.

Entry presents several difficulties, the cave still active thread by flowing water coming from two Zătoane. It is divided into three floors. The first floor, the asset that is the main route, has a length of 950 m.

The second floor called subfosil floor, where waters come only during the period when the lake is full, is 1,200 m and includes galleries of great beauty, such as gallery with anastomosis. The difference in level between the three floors is 20-25m, upper galleries and the access is through a place called Balcony.

Fossil Gallery has a length of 1,250 m around the most interesting cave. Here is the Crystal Gallery waves, a truly wonderful experts describe as:

"The ceilings hang, one side blades variable height, some monochrome yellow, reddish or whitish, others older, striped with bands, some wide, some narrow that go parallel to the ceiling and the lower edge the Veil as splendid EYOF Maramures dominates the reds, yellow and brown. These strange stripes highlights not only moments of charging solution that was seeped with various iron oxides. In fact these marks bands, isochronous, height he had a veil at a time, that of filing strip. This magnificent dungare is best evidenced by a light veil on the opposite side, whereas amazing but true, it turns translucent stone. "

Totaling over 4860 m of galleries, the cave is characterized by a distinct personality in harmony with Romanian karst. It can be accessed only when the waters dry bulb and the entry and overcoming the two siphons.

Material taken from the site Ponoarele Hall.