In 1837 (that a year was exceptional wet) the killer stone rising onto the east (1401 m) from his side the clayey slope debris getting wet properly landslide crashed down and hampered by the water of the Békás brook, the capital feeders of which they are, Vereskő, the bulbous, hole and Cohárd they were brooks. Others the formation of the lake the 1838. January 11-- it is connected with an earthquake. The limestone got underway after the landslide frittering, which one a big amount got mixed with clay. The impermeable effect of this the oozing of the living water ceased shortly and took shape gradually in this manner the damming up. His old name Veres lake (in Romanian Lacu Roşu). The residues of the pine-wood covering the former valley, his fossil stumps, his stumps get out from the water of the lake today yet. The iron oxide, chalky water preserved the stumps of the trees. The surface of the lake reflects the red limestone rocks of the coasts in beautiful time. The damming up definitive onto 1838 of his summers took shape. His water level was taller at this time and cca. 1 km reached up into the valley of the bulbous brook long. The murderous name derives from there according to the tradition, that shepherds grazed their sheep on the ones sloping when the land swallowed them suddenly on the time of the catastrophe. Somebody else murdered the pine-wood according to an opinion and today from the water towering above stumps, than an age tax's wooden headboards warn the wanderer about the transitoriness for the abandoned cemetery of one of the Székely parishes - memento mori!"(L. Gyárfás Győző, 1910. 66). The ice of the lake broke in on one of the winters according to a folk tradition likewise, and the crossing ones died of it together with their animals. Rainfall the inflowing brooks paint it yellow-red the water of the lake and a considerable amount of stream deposits are delivered into the lake. It is made to come from the limestone layers with a red colour the Veres lake name. Kis-Cohárd the reflection of the mass of a mountain range inspired several painters to a creation in the water of the lake.
Transylvania one most spectacular, and his outleap attended by many people the Peterdi-gerinc and the Kövesbérc-Szindi took shape between a limestone spine. The cleft came as a result of his collapse for the roof of a limestone cave hollowed by water according to the scientific explanation onto existence.
On the bottom of the gorge valley with a longitude of some three metres, a Hesdát brook flowing into Aranyos throughout flows between the cliffs exceeding the 200 metre altitudes.To the cleft several saint László a legend is attached, the king the place of the horseshoe of his horse shows on one of the rocks today yet, on the Patkós stone.
There are 32 excavated caves in the cleft, from among which the largest the 75 metres long, 19 metres wide and 11 metres of tall Porlik cave, where they are dripstones can be found. Famous yet the II. Kis named after a rogue supporting Rákóczi Ferenc- and Nagybalika caves. The approach of the majority of the caves but positive heavy and dangerous.
Are typical of his rich flora, that from the 3500 plant species living in the country here 997 féle can be found. In the shade of the peaks, in the windless passes and they remained between the rock curves the tertiary period, the ice-age, the Black Sea and the Pannonia, the steppe, and the alpine plant species.
The Tordai-hasadék since 1939 nature conservation area, today constitutes 125 hectares of surface.