Poland’s Solina dam, completed in 1969 and the tallest dam in Poland, has been collecting dirt and grime on its walls for decades. But when it came time for the 82m dam to get a good powerwash, the energy company Polska Grupa Energetyczna had an idea.

PGE worked with emerging comic book artist Przemek “Trust” Truściński to design a giant eco-mural honoring the wild and plant life found in the Bieszczady Mountains in southeast Poland, where the dam is located. 90m wide and 54m tall, the mural is painted with a technique called “reverse graffiti.”

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