Some Hungarian will go on a doable flat hiking from Interlaken to Merlingen tomorrow 10th April.
This is the tour description: http://www.wanderungen.ch/de/touren/...ish=1&select=1
On the route we go to the Beatus Höhlen. http://www.beatushoehlen.ch/
We meet at 10:45 am near here (Parkplatz :P ) : https://goo.gl/maps/iEg9aws5hHn
Weissenaustrasse 12, 3800 Unterseen
If you feel like joining, come along!
Perhaps drop a pm to me.