aerial drone shot of green hills by the toba lake at haranggaol in simalungun, sumatra utara, indonesia

asia asian attraction background calm calmness conservation countryside dam destination ecology ecosystem environment fisherman foliage forest fresh water greenery holiday idyllic indonesian island lake landscape lush morning natural nature north sumatra outdoor park recreation reservation reservoir river rural scenery scenic serene settlement tourism tranquil tranquility travel trees tropic tropical vacation view sources houses villagers aerial drone shot green hills toba haranggaol simalungun utara indonesia