What are nature reserves for? what are some of these parks and reserves? when did they appear? what can people enjoy there?

Перевод: Для чего нужны природные заповедники? Каковы некоторые из этих парков и заповедников? Когда они появились? Чем люди могут там наслаждаться?

ответ на 1 вопрос: The main purpose of national Park and nature reserve - conservation of the living organism, balancing on the verge of extinction.
ответ на 2,3,4 вопрос: 
Reserve Kivach.
This glorious nature reserve and its namesake waterfall. It is located in a land where a harmonious blend combines three elements: stone, wood and water. It is the oldest nature reserve as there were in 1931. The choice of location under protected area was determined by the location of the waterfall, which has become a favorite attraction of tourists. And since around it are pine forests, there was a need to protect them from logging. The terrain of the reserve is interesting in the sense that all sorts of the terrain of Karelia. So, there are eskers (Selge) "curly rocks" and "the mutton foreheads". Visitors to the reserve are sightseeing the area, involving the arboretum, Museum of nature, and the aforementioned waterfall.