It is composed of four villages: Bârzava (Csíkborzsova), Făgețel (Bükkloka), Frumoasa, and Nicolești (Csíkszentmiklós).

[citation needed] It is situated in the foothills of the Ciuc Mountains, at an altitude of 790 m (2,590 ft), on the banks of the river Frumoasa.

The Frumoasa Dam is located on this river, forming a reservoir [ro] with a volume of 10.6 km3 (2.5 cu mi).

It is traversed by the national road DN12A [ro], which connects Miercurea Ciuc with Onești, Bacău County, crossing the Eastern Carpathians through the Ghimeș-Palanca Pass.

The territory of Northern Transylvania remained under Soviet military administration until March 9, 1945, after which it became again part of Romania.