There is no substitute for the mystery and beauty of natureThere is no substitute for the mystery and beauty of nature
Portrait of a beautiful, mysterious stranger in a turbanPortrait of a beautiful, mysterious stranger in a turban
The suspension bridge is mysteriously swinging in the fogThe suspension bridge is mysteriously swinging in the fog
Нечто неразгаданное, ещё не познанное. Нечто скрываемое от других, известное не всем, секрет.