tsarska or royal bistritsa park for rest and walk with differently trees in venerable autumnal forest near by resort borovets

autumn autumnal bistritsa borovets branch bulgaria bunch color coniferous dark deciduous differently foliage forest fresh green hiking landscape leaf leisure majestic mountain natural nature near outdoor park plant popular relax resort rest rila royal season shade sky sunny tourism tranquil travel tree tsar tsarska tzar venerable vibrant view walk yellow