Only 12 km away from Mostar, overlooking the waters of the Buna River, is the charming little town of Blagaj, a medieval town of the Hum principality, which around the min-15th century became the today’s Herzegovina. Standing on the remains of the ancient city of Herzeg Stjepan, you can admire a stunning panorama of the valley of the Buna River, which justifies one-hour long hike uphill.
There is also the famous natural spring of the Buna River in Blagaj, the largest karst spring in Europe with an average annual flow rate 43 m3 per second.
The water spring out from a 15-metre-wide cavern and underground stream of Buna is about 200 m long.
Buna River is the finest example of an underground karst river and flows west for approximately 9 km joins the Neretva River. Its water, which is exceptionally cold and clean, is natural habitat of the endemic softmouth trout species – meka.
There are 11 national monuments in Blagaj, every one of them an attraction to wich the toursit flock..