Sulfur dioxideSolfataras eject gases containing sulfur and sulfur dioxide, forcing visitors to go around in a wide circle. |
Big fumaroleA big hole in the ground, having the shape of a small crater, blows gases up to the sky. The walls are covered with sulfur crystals. |
Active craterPowerful solfataras send their gases into the atmosphere at a temperature of up to 700 deg C and their smoke is still visible from long distances (see first picture above). The surroundings are covered with sulfur and other minerals. |
Bottom of the craterThe crater is about 180 m deep. Down at the bottom a few fumaroles join their colleagues further up in the walls. The yellow sulfur deposites can be seen. |