Geok Tepe, Gökdepe or Gokdepe, is a former fortress of the Turkmens, in Turkmenistan, in the oasis of Ahal, on the Transcaspian railway, 28 miles north-west of Ashgabat. Gökdepe is the Russian version of the Turkic name meaning ‘Blue Hill’ from the Turkmen gök ‘blue’ and depe ‘hill’ or ‘summit’ (...) (from Wikipedia)