I really love this card a lot! It shows Kyiv, the captial and largest city of Ukraine, located at the banks of the river Dnjepr. In the foreground is the Saint Sophia Cathedral, which is part of the UNESCO World Heritage Site Saint Sophia Cathedral and Related Monsastic Buildings, inscribed into the list in 1990 with a minor modification in 2005.
The card was sent by Irina (mindanao) for the Postcrossing Favourites Tag. The stamps were awesome too!