Bombergsgrottan has a small entrance, a hole at the bottom of a big cliff. But the small hole hides a big (25m, big by Finnish standards) cave that extends left and right under the cliff.
The crawling is good, on top of sharp rocks and under the close and relatively smooth roof.
Bombergsgrottan is in Liljendal, and easily accessible, by the road. Coordinates: N 60.60521 E 26.05246.
See more caving stories at Planetcaver.net, and all Planetskier and Planetcaver stories at Blogspot and TGR! See also my cave map that runs the Psgeo software that has now been open sourced! This article and videos is (c) 2016-2020 by Jari Arkko, and all photos (c) 2016 by Jarmo Ruuth. All rights reserved.