Wonderful Bridges is a rock phenomenon also known by the name of rock bridges. Situated in the valley of the river karst Erkyupriya in the Western Rhodopes at 1,450 meters above sea level at the foot of Mount Great Persenk.Mostovete were formed due to high water erosion activity in the past river transformed cracks in marble in deep water cave, the ceiling over time thins places and collapsed . It is assumed that the debris from the collapse were later taken to the waters of rekata.V result remained two famous marble bridge. Largest is about 15 meters wide in the widest part , almost 100 meters long consists of three arches, the largest has a height of 45 meters and width of 40 Little Bridge is 200 meters from the largest on the river – impassable , 60 m long , with a total height of 50 meters, but the arch – 30 months after it has very little third bridge , which is a pot-hole cave in which waters Erkyupriya disappear to reappear on the surface after 3 km . both area around the bridge is covered with conifer forests consisting mainly of spruce trees. Both bridges are safe and suitable for tourist purposes. Passage is allowed and on , and below them. Interesting tradition arose after the announcement of bridges tourist site – every tourist , passing under the big bridge , record your name with charcoal stenata.V near the phenomenon are numerous caves, but most of them are not fit for visits by tourists because they are not lit and secure. Nearby are the huts and ” Wonderful Bridges ” and ” Rock bridges .” Wonderful Bridges are one hundred tourist sites, Bulgarian Tourist Union : No. 85 – Grand Perelik , landmark ” Wonderful Bridges” has a seal . Possible places for tourism and accommodation : Chalet ” Wonderful Bridges ” hut ” rock bridges .” Stewardship of tourist company ” Studenetz ” – Chepelare .