Abr jungle (literally meaning cloud forest), as a diamond in Semnan, Iran, is one of the oldest and most beautiful jungles in Iran with some rare plants and animals. A few hours before the
Sunset, when temperatures fall, clouds surprisingly rush into the forest. The settling clouds are so thick and the mountain are so thin in this part, so that it seems we are walking on clouds. The Forest, which stretches on an expanse 35,000 hectares in area, is part of the ancient Caspian Hyrcanian forests which have encircled the northern slopes of the Alborz Mountain like a belt, covering the southern coasts of the Caspian Sea.