Calimani Mountains are located in the north western part of the Eastern Carpathians, representing the largest volcanic mountain area in the country. They are bordered by Bargaului Mountains to the north, Bistritei Mountains to the east, the Mures defile to the south and in the west the piedmont hills of Calimani get in contact with the Transylvanian plateau.
Calimani, with their highest peaks, Pietrosu – 2100 m and Negoiu Unguresc – 2081 m are the most impressive of all the other volcanic mountains of the Carpathians, Gurghiu (max 1776 m), Harghita (max 1800 m) and Ciomatu (max 1301 m).
In its sector numerous volcanic cones appear, partially destroyed by erosion, but mostly by collapsing, leading to the formation of immense craters, the main one having more then 10 km in diameter.
The volcanic rocks are sitting on a foundation formed by crystalline slate, sedimentary formations and filch deposits. One of the most interesting volcanic formations is the human shaped boulders on the “Twelve Apostles” (1750 m), declared natural reservation.
Flora in the Calimani Mountains is represented by the mixed forests of beech and spurs on the lower level, dwarf pine and juniper on the sub alpine level and a variety of herbs, flowers and wild berries on the upper level.
Fauna is represented by deer, wild boars, brown bears, lynx, foxes and a verity of birds.
After the invasive mining exploitation during the communist regime, Calimani Mountains are now protected, the area becoming a National Park. The lack of the tourist infrastructure and its geographical isolation made the entire area an unknown and wild geological wonder land, waiting to be discovered and explored.