Gettysburg National Park is the site of largest American Civil War battle. Thanks to YL for mailing from Gettysburg, Pennsylvania.
This is the tallest Orthodox Christian church in the world. It was rebuilt after its destruction. Thanks to Nastya of Moscow, Russia.
Freiburg Münster medieval cathedral of Freiburg im Breisgau, Germany. Thanks to Petra for mailing from Freiburg, Germany.
Litoral norte de la Habana. Mailed from Austria by Sabrina. I prefer postcard mailed from country of origin but sometimes it cannot be helped.