Tang-e Heykh

Tang-e Heykh is one of the natural tourist attractions of Dayyer County in Bushehr Province, Iran. The gorge lies 3.5 kilometres northeast of the town of Dorahak, 15 kilometres northeast of the port of Dayyer and 16 kilometres northwest of the port of Bandar Kangan. A freshwater spring flows through the gorge and is home to several species of fish and crab. The spring's water is channelled toward the gorge from the Ahmad Salman mountain range near Dorahak, creating a natural, unspoiled habitat for wildlife.

At the entrance to the gorge stand the remains of an old water mill, now in ruins from the passage of time and natural changes. The mill dates back several decades. When the gorge held plenty of water, people travelled long distances to this area to have their wheat ground. Today only its remains survive, about one hundred metres into the gorge, with little left of its former glory and prosperity.

Next to the gorge is a date palm and lime orchard. Its water is piped from the gorge's spring to the orchard and stored in a fairly large pool, to be used for irrigating the trees. There is also an imamzadeh (a shrine of a descendant of an Imam) on top of a hill beside this orchard, which is regarded as a pilgrimage site by residents of the surrounding villages. Unfortunately, no historical information or exact name for this imamzadeh is available.