Solothurn
- Ruins of Balmfluh Castle, Balm bei Günsberg
- Ruins of Alt-Bechburg Castle, Holderbank
- Neu-Bechburg Castle, Oensingen
- Blumenstein Castle, Solothurn
- Buchegg Castle, Kyburg-Buchegg
- Ruins of Dorneck Castle, Dornach
- Alt-Falkenstein Castle, Balsthal (Klus)
- Ruins of Neu-Falkenstein Castle, Balsthal
- Ruins of Frohburg Castle, Trimbach
- Gilgenberg Castle, Zullwil
- Rotberg Castle, Metzerlen-Mariastein
- Steinbrugg Castle, Solothurn
- Ruins of Sternenberg Castle, Hofstetten
- Ruins of Neu-Thierstein Castle, Büsserach
- Waldegg Castle, Feldbrunnen-St. Niklaus
Read more about this topic: List Of Castles And Fortresses In Switzerland