Keep Your United Nations Stamp Collection Up to Date
These World Heritage stamps were issued by the Vienna Office of the United Nations in 2021. The United Nations Educational Scientific and Cultural Organization (UNESCO) has preserved over 1,000 World Heritage Sites in countries across the globe. In 2021, six stamps were issued honoring UNESCO's World Heritage Sites for waterways, railways, and bridges. The Vienna stamps picture Fort Bridge in Scotland and Mostar Bridge in Bosnia and Herzegovina.