The Republic of Karakalpakstan
The 4th- to 3rd-century BCE fortress Gyaur-Qala “The Fortress of Infidels” (thus later named by Muslims, as the inhabitants were Zoroastrians), with ten-metre walls surrounding ruins of two citadels that presumably could be a temple and palace constructions. One of citadels could serve as a protective construction and a temple. The fortress continued to function up to the arrival of the Mongols to the Central Asia in 1220, when it was destroyed.
Photo by Ludo Kuipers, Fri Jun 07, 2013