Mandatory Credit: Photo by INA Photo Agency/Shutterstock (11713221b) Mount Merapi, the world's most active volcano, hot lava flows down from the crater of Mount Merapi as its activity continues, in Pakem, Hargobinangun, Yogyakarta, Indonesia, January 17, 2021. Merapi is one of the most volatile among the country's more than 120 volcanoes in Indonesia. Merapi volcano spews hot lava, Yogyakarta, Indonesia - 17 Jan 2021