Épiros, the north-western part of Greece, is located between Albania and the city of Préveza in the south. The western border is coastline and the central part is mountainous, the so called Pindos mountain range with the highest peak being Mount Smolicas (2,637m). The biggest city of this district is Ioannina, located at lake Ioannina.
The central area has some large rivers, due to frequent rains. In a high-plain, at a height of 450m, it also has a lake, Lake Ioannina, on the banks of which Ioannina is located. This lake has no draining river, and is a karst lake. The climate of the region is cool (at least that's how the locals call it) in the summer and very cold in winter.
The karst features and caves relevant to tourists are all located around Ioannina. The most famous cave of Greece, at least to foreign tourists, is at Perama, only 4km north of Ioannina. Another cave is 60km south of Ioannina in a secluded mountain valley.