This is the 4770th most frequent Russian word.
заповедники
Nature reserves.
Here, "заповедниками" refers to protected areas and emphasizes their natural beauty.
Россия известна своими живописными заповедниками.
Russia is famous for its picturesque nature reserves.
In this instance, "заповедники" indicates places preserved for touristic visitation under environmental protection guidelines.
Многие заповедники открыты для организованных экскурсий.
Many reserves are open for organized tours.
Here, "заповедниках" refers to well-maintained natural habitats providing safety for wildlife.