In the northern part of Lake Onega is Zaonezhsky Peninsula. It is part of the territory of Medvezhegorsk district of Karelia. This unique historical and cultural complex is also rich in mineral springs. One of the most popular sources is - "Tsarina Key", located towards the Great Bay, the 5 kilometers from the village Tolvuya and 70 meters from the road. The first mention of the churchyard Tolvuya found in the documents of the XIV century. It is one of the oldest Russian settlements on the shores of Lake Onega. In the early 18th century, about Tolvuyskogo churchyard were 33 settlements.

Tolvuya The village is surrounded on three sides by the waters of Lake Onega. Here, a special microclimate, perhaps also due to deposit Shungite - the stone with unique therapeutic properties. As it has long been known therapeutic properties of water sources in the area. The locals used them long before 1714, when they were discovered world-famous Marcial ferruginous water.

This spring has a long history associated with the Romanov dynasty. It is named in memory of the mother of the first Russian Tsar Mikhail Fedorovich - nun Marfa, which locals call "The Queen." At the end of the XVI century on the throne, he reigned in Boris Godunov, and since he was not an heir to the throne of the royal blood, then tried to get rid of possible rivals of the royal family. Boyar Fyodor Romanov and his children were the most likely contenders for the throne, as it accounted for the brother of the wife of Ivan the Terrible - Anastasia. Fyodor Nikitich was sent to Antony of Siya Monastery. His son Michael and his sister were taken to the White-lake. Wife, Xenia Ivanovna, took the veil with the name Martha and banished from 1601 to 1605 on Tolvuysky churchyard.

Terem, where lived the unfortunate prisoner, was small and was behind by peasant houses near the church. On Tolvuyskom churchyard in the 17th century. There were three churches: the Holy Trinity, St. George, St. Nicholas. In 1869 on the site of the wooden church of St. George was rebuilt stone, preserved until now. In place of the Trinity Church in the early 20th century, built a chapel in memory of the 300th anniversary of the Romanov dynasty. In the annals of the church indicated that tower nun Marfa stood north of the church. From a window overlooking the Lake Onega and forests Paleostrova located 6 km from Tolvuya.

Separation from her husband and children, poor nutrition status prisoner led to a serious disease - epilepsy is called epilepsy before, I began to torture the nun Martha. Local residents sympathized with the disgraced noblewoman and advised treated water source. Water from this spring really has a great calming effect. According to legend, it was easier for the suffering and heal the unfortunate prisoner. Therefore, this place came to be called "Tsaritsyn key."

Nun Martha had not forgotten, and returned thanks to the residents Tolvuya, after accession to the throne of her son Michael, the peasants were granted the village, and the priest Ermolai Gerasimov - small land on Petrovsky churchyard in Chelmuzhi.

Now this ancient source is not difficult to find, it is the right of the road on Medvezhyegorsk, before the village, set around a low wooden fence. The water source is crystal clear, making your way through the natural soil filter, it is cleaned and mineralized, saturated with oxygen, which is why it has a soft, amazing taste. Even in ordinary plastic bottle, it sparkles with tiny asterisks and is not spoiled for a long time, up to 6 months retains its natural flavor. But every year, according to local residents, the key is running out, and the water in it is becoming less and less.