RASHT, Oct. 25 (MNA) A hand-dug tunnel in Mikal village near Siahkal, Guilan province, provides invaluable information as to the historical past of the region. Mikal, a village near Siahkal, found media fame with discovery of a hand-dug Parthian-era tunnel. The tunnel was known for the local people since 1960; an attempt to delve deep into the ...