Lava flow from the Monti Calcarazzi fissure on the southern flank of Mount Etna in 2001, threatening the town of Nicolosi below, Sicily, Italy, Europe

travel photography travel destinations color image night outdoors horizontal nature natural world natural disasters eruptions erupting lava flow lava flows lava molten fire danger topography surface processes physical geography geology italy europe monti caltarazzi mount etna etna sicily nicolosi unesco