The karst landscape around the Czech villages in Banat belongs to the the eastern part of the Munții Locvei mountain range and is made of Mesozoic limestone. In addition to a number of sinkholes and ponors, there are karst valleys and gorges with many spring caves. Since 200ž, these have been the subject of interest for Czech speleologists, who have made a number of interesting discoveries.
The Poleva Cave (Peștera cu Apă din Valea Polevii) with a water flow is located in the Valea Polevii valley about 8 km from St. Helena. With a length of almost 1 km, it is one of the longest caves in the area. It is known for its beautiful stalactites.
The Rajka Spring (Peștera Cicalavat) is located directly under St. Helena and is beeing used as a source of drinking water. It is only accessible to divers.
The dripstones in the Jasanka cave. (Photo by Z. Motyčka.)
The Peștera Alibeg cave, known as Velebný žlábek, whose inconspicuous entrance lies about 20 m above the forest road in the Alibeg valley, is horizontal and has a watercourse running through it for 120 m. The total length of the cave is 200 m.
The Jasanka Cave, the longest cave in the area, was discovered by Czech speleologists. In the left side of the Vranovec valley, they managed to enter an 80-metres long passage flooded with water. After a series of dives and some pumping, they discovered a massive cave with stalactites. The total length of the cave is 2 104 m.