Most researchers agree that the Guanches performed their worship in the open, under sacred trees such as pine or drago, or near sacred mountains such as Mount Teide, which was believed to be the abode of the devil Guayota. Mount Teide was sacred to the aboriginal Guanches and since 2007 is a World Heritage Site. But sometimes the Guanches also performed worship in caves, as in Cave of Achbinico in Tenerife. Until the 20th century, there were in the Canary Islands (especially in northern Tenerife) individuals called Animeros. They were similar to healers and mystics with a syncretic beliefs combining elements of the Guanche religion and Christianity. As in other countries close to the islands (e.g. marabouts from the Maghreb), the Animeros were considered persons blessed by God.