The stamps show scenes from the Biebrza National Park and the Łuk Mużakowa Geopark in western Poland.
Poczta Polska spokeswoman Justyna Siwek said: “In this way we are encouraging people to spend their summer holidays in Poland, showing further interesting corners of the country.”
She added that the stamps have QR codes which direct people to videos promoting Polish tourist attractions.
The stamps are the latest in a series called "Poland See More," which previously featured stamps depicting the Baltic coast and the historic Wieliczka Salt Mine in southern Poland, which is a major tourist draw.
(pk/gs)
Source: IAR