The region's most popular and most visited cave is the Sugău cave (Peştera Sugău), situated in the Giurgeului Mountains, where according to their pretensions, the volunteers can take part in tours with different difficulties.
Only the Sugau cave, the Munticelul cave and the Licos shaft cave is open for tourists. The rest of the caves are closed and protected by the National Parc.
The geological circumstances of the Lacul Roşu (The Red Lake)-Cheile Bicazului region favoured the formation of the caves. Owing to this, there are numerous stalactite and shaft caves, among which the most important are:
a.) Peştera Kotej (Kotej-Cave): it is situated in that part of the Hăşmaşul Negru, which looks in the direction of Bicajel, 1240 metres height above sea level. The cave is 87 metres long, in which we can see interesting pillars covered with lublinite.
b.) Hăşmaşul Negru shaft cave: it is situated in that ridge of the Hăşmaşul Negru, which slopes towards the Trei Fântâni, 1250 metres height above sea level. One of its shafts, filled with snow, is 10 metres deep, the other one is 20 metres deep. On the side of the cave there is a dripstone-flow.
c.) Telecu Mare shaft cave: it is situated eastwards from the Poiana Albă, northwards from the Telecu Mare peak, 1650 metres height above sea level. The shaft cave begins with a 20 metres deep shaft, which is closed by a heap of snow. From here it starts an 8 metres long, mildly sloping passage, which leads to an other 9 metres long shaft, and to its bottom it slopes a narrow, clayish passage.
d.) Peştera Tolvaj (Tolvaj cave) : it is situated in that part of the Szakadat peak, which looks in the direction of Năşcălat, 1200 metres height above sea level. It is a 50 metres deep tectonical cave, adorned with dripstone-flows.
e.) Licoş shaft cave: this legendary cave opens on the top of the Licoş peak. Its complete length is 50 metres, and it is divided into three, well separable parts. At its mouth the cave's diameter is 8 metres long, at its narrowest part it is 3 metres long, and at its bottom it is 9 metres long. At the bottom of a 34 metres long aven there is a 3 metres long ice-jam. In summer next to this ice-jam it forms a narrow opening, and through this you can get down to the lower cave, which depth is 17 metre and it is closed by debris.
f.) The tectonical caves of the Vitoş peak: the Vitoş peak is situated northwards from the Pângăraţ pass above the Putna stream. On its eastern side it opens three shaft caves, whose depth is more than 10 metres.
g.) The caves of the Cheile Bicazului: in the cliffs of the Lacul Roşu (The Red Lake)-Cheile Bicazului are 51 caves kept in evidence. Most of them are hard accesible, smaller caves, without any special dripstone. The longest caves are situated in the Peretele Bardosului opposite the Maria source, like the Peştera Bardosul (-141m), Peştera Cascada (-69), Peştera Flacăra (-242).
h.) Munticel-cave: it is situated in the eastern side of the Munticel rocks. This 40 metres long and 20 metres broad cave was discovered in 1973.