A mysterious lake in a valley surrounded by mountainsA mysterious lake in a valley surrounded by mountains
Mysterious berries and flowers in the illustrationMysterious berries and flowers in the illustration
Mysterious silhouette of a girl in a gloomy forestMysterious silhouette of a girl in a gloomy forest
Нечто неразгаданное, ещё не познанное. Нечто скрываемое от других, известное не всем, секрет.