The father of the psychoanalysis Sigmund Freud spent his holidays in Hotel Wolkenstein.
On page 271 of his book Briefe 1873 bis 1939 you will find a letter to Jung.
Hotel Wolkenstein in St Christina, Gröden.
18 August 1907
Until the end of August I shall stay here, hiking in the mountains and picking edelweiss; I shall not be returning to Vienna before the end of September.