Switzerland's Only Cave Castle

Switzerland's Only Cave Castle. The Balmfluh cave castle ruin is the only Grottenburg in the canton of Solothurn and one of the few in Switzerland, with a name…

Location: Balmfluh, Solothurn, Switzerland

Category: hidden

The Balmfluh cave castle ruin is the only Grottenburg in the canton of Solothurn and one of the few in Switzerland, with a name derived from the Keltoromanisch word 'Balb', meaning overhanging rock.

Source: Balmfluh, mittelalterliche Höhlenburgruine

Switzerland's Only Cave Castle — Solothurn, Switzerland

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