The fortress of Urvich, or rather, its ruins are located on the slopes Lozinski mountains at a distance of one kilometer from Kokalyane, over connecting Sofia and Samokov road. Nearby Kokalyane monastery.

Still cannot sort out the history of the fortress to the end. Scientists suggest that strengthening built in the 13th century for the protection of the access to Sofia between two mountains. In the 13th century the name of the fortress was Sredets. The fortress was surrounded by turbulent waters of Iskar river on three sides, they seemed to be truly impregnable. To the present day remained only the foundations of the walls, one battle tower and Church of St. Elijah in the fortress.

Urvich be shaped like a trapezoid approximately 350 meters in length and 150 in width. It was surrounded by a solid wall. The most vulnerable were protected by towers. The thickness of the walls of one of the towers up to 1 meter 20 centimeters, its height reaches 7-8 meters.

The most frequent mention of the fortress date back to the last battle against the Turkish invaders of Tsar Ivan Shishman, who ruled from 1371 to 1395 year. Seized Ihtiman and Samokov Turks were sent to Sofia, however, to get there, they needed to take the fortress of Urvich.

According to the local tradition, the inhabitants of the surrounding villages participated in the construction of the fortress. The Turks had made many attempts to attack the fortress, but they all ended in failure. Then they decided to resort to stratagem. It was necessary to find a secret passage through which at night the inhabitants of the fortress supply water from the river.

The Turks caught shepherdess from the village nearby and accused her of killing the baby if it points to the secret passage. Woman for the sake of the child has violated the oath of secrecy and revealed where the secret passage. Later cowgirl cursed himself, as the legend says, turning to stone. But the attackers broke into the fortress and destroyed it.

Information about the existence of the fortress of Urvich after Bulgarian enslavement missing.