By – TreeHugger.com – Photo: Reskate.

Spanish artistic duo María López and Javier de Riba of Reskate Studio take the mural to another level: not only are their huge works seen during the day, but at night, they reveal yet another hidden, glow-in-the-dark layer of meaning. Their latest is “Hizkuntza,” which depicts a simple-looking whale during the day, but as night falls, one can see another ghostly image emerge, one of sailors inside the creature.

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