The Marvelous Bridges, or Wonderful Bridges is a rock formation in the Rhodope Mountains in southern Bulgaria. It is located in the Karst valley of the Erkyupryia River in the Western Rhodopes at 1,450 metres above sea level, at the foot of Persenk Peak.
The formation consists of two bridge-shaped boulders. The large one (situated upstream) is 15 metres at its widest and 96 metres long, and shaped by three vault arches, the largest of which is 45 metres high and 40 metres wide. The Erkyupriya River flows under the middle-sized arch. The large Wonderful Bridge is passable under the vaults where birds nest in the marble clefts.
This panorama is taken from under the large bridge.