In the south-Herzegovina is a beautiful valley Popova fields. This small ancient Krsna field is part of the largest karst areas in the world who are over Croatian stretches all the way to Slovenia. Not far from the Flat, a town in the far south and Herzegovina Orthodox monastery Zavala is the largest cave system discovered in Bosnia and Herzegovina -Vjetrenica. Cave channels have a total of 6 kilometers a stunning main channel delves 2.5 kilometers in the bowels of the earth. The trails are intended for visitors are clearly marked and illuminated. Among the many archeological findings, there are the remains of cave bears and leopards, cave drawings whose age is estimated to be 10,000 years old. The cave is also home to numerous small lakes where endemic crabs that can be found only in underground water systems. Vanessa is now on UNESCO’s list of protected areas in Bosnia and Herzegovina. The cave has recently reopened to the public after extensive research and improving infrastructure. The road to Vjetrenice is well marked tourist signs, whether you are coming from, Stolac, Trebinje and Neum.