The Ramsar Palace or Marmar Palace is one of the historic buildings and royal residences in Iran. The palace is in Ramsar, a city on the coast of the Caspian Sea.
Wikipedia https://en.wikipedia.org/wiki/Ramsar_Palace
Official Website http://www.ramsarpalace.ir/
Address Sakht Sar, Iran
Coordinates 36°54'12.726" N 50°39'15.128" E