The Gnappstein
Links:
https://www.solothurn-city.ch/de/solothurn-erleben/sport-erholung/wandern/wanderrouten/megalithweg
https://www.steinmuseum.ch/solothurner-megalithweg/
http://www.steinmuseum.ch/wp-content/uploads/2017/10/Megalithweg_Leporello.pdf