Mustavuoren linnoitusalue
Huts
Video: https://www.youtube.com/watch?v=klQnbW-20Ls
Description: Mustavuori Fortified Area features quared caves and ravines, but caution is advised due to potential falling risks and dislodged boulders from the caves and trenches.
Is it free?: Free
Website: Mustavuori
Region:: Uusimaa
City:: Helsinki