QUESADA, SPAIN—A UNESCO-listed rock-art panel estimated to be 5,000 years old was destroyed by thieves who tried to remove it from the wall of Los Escolares Cave, according to a report in The Local. Visitors to the cave, located along the Mediterranean coast, noticed the chip marks and rock fragments on the floor. “A lot of these places are abandoned and need greater supervision. Although there is legislation protecting these sites in theory, there is a lack of political will,” said José Antonio Berrocal, president of the Speleology Federation of Andalusia.