Mustavuori caves, fortress, and WWI trenches in Vuosaari, Helsinki

Mustavuori (Black Mountain) is a place where history and natural wonders have been forever mixed together. It is one of the most exciting places outdoors Helsinki has, and it is perfectly suited for adventurers of all ages. It has to be said at this stage that children must not run around in the area because the super-exciting caves and trenches do appear out of nowhere.

We stepped onto the well-covered hiking trail just next to Itäväylä (road 170) in Vuosaari. There...

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