
In September 1912, Wittgenstein, together with David Pinsent, embarked on a trip to Iceland. Their route, which roughly corresponds to today’s "Golden Circle," also led them to the famous Geysir.
Source: Pinsent, D. H. (1994). Reise mit Wittgenstein in den Norden: Tagebuchauszüge, Briefe (Hrsg. von G. H. von Wright). Folio Verlag.