Betty, I'll try to explain shortly:
Karst is a rocky land, where the influence of water on the limestone creates a special surface shapes, caves and underground tunnels.
Our Carst are characterized by the following:
strong and cold wind "burja" (bora) - icy, jerky north wind,
many caves and disappearing rivers,
good vine “Teran” and prosciutto.
Visit Karst is an experience in every season, but autumn is the most beautiful and charm.
Rivers in Karst areas may disappear in underground a number of times and spring up again in different places, usually under a different name
One of the most significant weather phenomena is certainly wind bora, which constantly reminds us to the power of nature: bora is also characterized by the fact that overturns the cars so the roads are often closed for traffic. Because such strong wind houses in karst have flat roofs or sloping roofs have attached more bigger stones which prevents the bricks blown away.
One of the largest and longest cave is Postojna cave – 20,570 m long Karst cave system, created by river. The caves are also home to the endemic olm, the largest trogloditic amphibian in the world.
Dear Betty, I could write much more about Karst, but I hope you can imagine at least a little on the basis of what I written.
Olm - Wikipedia, the free encyclopedia
A visit to the Postojna Cave