This card came from Natka and Seany via Postcrossing. And they have used a matching stamp, I love it!
The Khotyn Fortress is a fortification complex located on the right bank of the Dniester River in Khotyn, Chernivtsi Oblast of western Ukraine. It is situated on a territory of the historical northern Bessarabia region which was split in 1940 between Ukraine and Moldova. Construction on the current Khotyn fortress was started in 1325, while major improvements were made in the 1380s and in the 1460s. The fortress is a large tourist attraction for the area and Ukraine. In 2007, the fortress was named one of the Seven Wonders of Ukraine. It is also a National Ukrainian Architectural Preserve as of 2000.