One of the most mysterious and damaged estates in the vicinity of St. Petersburg is the estate of Fifth Mountain. It was founded in the late 18th century by the Renkovich and Fok sisters. The complex included a manor house, which was approached by three alleys, as well as a pond that was part of the park's composition. The name of the estate remains a mystery for local historians, as there has never been a First, Second, Third, or Fourth Mountain in the area. Perhaps the name Fifth Mountain held special significance for the original owners.

After the Renkovich and Fok sisters, the estate passed to the former civil governor of the Caucasus, Fyodor Briskorn. After his death, his widow, Olga Konstantinovna, built a stone church of the Holy Trinity in the village, which became the main decoration of the architectural ensemble.

During the Soviet era, the estate, like many other pre-revolutionary estates, was looted and fell into decline. Interestingly, the church continued to function until the 1960s, after which it was closed. Currently, the church of the Holy Trinity is severely tilted and may completely collapse. The overall appearance of the estate is even more lamentable, with only the foundation protruding from the ground. These ruins are open for visitation and are often frequented by tourists and enthusiasts of abandoned places.