This is a beautiful souvenir sheet, issued by Guinea in 2012, featuring architectural wonders of the world that are part of the UNESCO global heritage sites. The stamp features Stonehenge, which was built between 3000 and 2000 BC, and the background sheet includes an image of Chichen Itza, which dates to 600-900 AD. The sheet is Michel catalog #9279/ Bl. 2108, and is Post Office fresh, mint never hinged, and F/VF.