There is no substitute for the mystery and beauty of natureThere is no substitute for the mystery and beauty of nature
Mysterious forest thicket, the rays of the sun through the foliageMysterious forest thicket, the rays of the sun through the foliage
Mysterious night forest on the background of a full moonMysterious night forest on the background of a full moon
Нечто неразгаданное, ещё не познанное. Нечто скрываемое от других, известное не всем, секрет.