People visit the Beni Add caves in Tlemcen, Algeria, Aug. 17, 2026. The main gallery of Beni Add caves extend over 700 meters, with a depth reaching 57 meters, and are home to stalactites and stalagmites of varied shape. (Photo by Billel Bensalem/Xinhua)

People visit the Beni Add caves in Tlemcen, Algeria, Aug. 17, 2026. The main gallery of Beni Add caves extend over 700 meters, with a depth reaching 57 meters, and are home to stalactites and stalagmites of varied shape. (Photo by Billel Bensalem/Xinhua)

People visit the Beni Add caves in Tlemcen, Algeria, Aug. 17, 2026. The main gallery of Beni Add caves extend over 700 meters, with a depth reaching 57 meters, and are home to stalactites and stalagmites of varied shape. (Photo by Billel Bensalem/Xinhua)

People visit the Beni Add caves in Tlemcen, Algeria, Aug. 17, 2026. The main gallery of Beni Add caves extend over 700 meters, with a depth reaching 57 meters, and are home to stalactites and stalagmites of varied shape. (Photo by Billel Bensalem/Xinhua)