The formation of a complex monument of nature "River Ragusha" happened in 1976. It is located in the village of Ore Hill in Boksitogorsk district of Leningrad region. To reach the monument from the city of St. Petersburg to Boksitogorsk and then, after passing over the river, between the villages of Ore Hill and Clay.

A monument to the complex "River Ragusha" has the status of a monument of nature, created for the purpose of preserving Ragusa with its unique karst landscape, the outputs of the rocks, the valley formed in the shape of the canyon, as well as diverse and unique vegetation.

Geological structure unique river valley Regusci primarily due to the limestone that formed in the Carboniferous period. The limestones have a somewhat fractured nature and are on the earth's surface, which creates suitable conditions for the leaching process of mining of soluble limestone rocks, forming a large number of craters, including the crater collapse type.

The river valley is particularly tortuous and almost completely overgrown with trees and bushes. Near the bridge leading across the river to the village of Ore Hill valley almost completely blocked by a huge fragments of limestone, which gets placed on top of the rocks.

At the bottom of the bridge there is a canyon with sloping banks, which reach heights of over 8 m. the Cliffs greyish-yellow limestone rocks are located almost vertically, which makes an unforgettable impression. In some places the rocks are dissected by large cracks, and somewhere there are niches, forming a deep cave.

The upper Ragusa have a great resemblance to the headwaters of small rivers of the North-Western part of Russia, which is manifested in the formation of shallow valleys, as well as slow water flow among spruce forests. The plot of the channel, where the village of Ore Hill, in the spring and fall seasons filled with water. The lower part of the river valley is characterised by a discharge of water through Vaucluse – rising sources. Along the section of the development of karst processes river valley acquires canyon nature, in this case, the height of the boards is almost 60 m. the Banks of Ragusa in this part of the steep, indented by several streams, and sometimes you can see small waterfalls. In some places the canyon slopes dotted with limestone fragments, which are visible on Jasper nodules.

No less varied and unpredictable fauna of the river Ragusha. The valley is dotted with rare for this area of broad-leaved and alder forests, which are presented in the form of a variety of floristic complexes, such as nemoral, boreal and some others. Here you can see the broad-leaved bell, giant fescue, on the rocks and mosses. But the most beautiful representative of the flora of the protected area is a forest Orchid or moccasin flower.

The river is a great place for spawning of certain species of trout. The upper reaches of the wetlands are particularly rich local fauna: middle-Curlew and grey-crowned crane. In addition, it provides the largest number of birds grouse species. A special pride of the natural monument are nesting dippers, and in the upper reaches of Ragusa are beaver settlement. Almost the whole area of the natural complex conditions of living elks, wild boars, raccoon dogs, wolves, foxes, hares, badgers and even brown bears.

On the territory of the complex of the monument is strictly prohibited: reclamation work, plowing the land, any interference in the hydrological regime of natural areas, geological survey, laying of all types of communications, use of pesticides and toxic chemicals, marine litter the territory and water area, as well as hunting and Parking.

Today on the perimeter of the bed of Ragusa there are areas in the form of the forest belt, the width of which reaches 15 meters, which is created in order to protect the river basin. The government of the Leningrad region, and more specifically the Committee on environment and natural resources is intended to preserve unique natural area, including its inhabitants.