The Llaima Volcano is one of the largest and most active volcanoes in Chile. It is one of several volcanoes which form the Campanian volcanic arc. LIPs are fundamentally different from any other currently active volcanoes or volcanic systems. These larger pingos can have craters that have cones resembling those of volcanoes. Laguna is home to the Laguna Volcanic Field, a group of 200 volcanoes and maars. Tectonically, Indonesia is highly unstable, making it a site of numerous volcanoes and frequent earthquakes. Many of the active volcanoes are international mountains shared with Chile. Mount St. Helens is geologically young compared with the other major Cascade volcanoes. Laguna is home to 24 mountains, most of which are inactive volcanoes. Benzene also has natural sources such as volcanoes and forest fires. It has some of the oldest (extinct) volcanoes on the planet. Other dormant volcanoes may potentially be active. The volcanoes of Mars are very similar to the shield volcanoes on Earth. Katla is one of the largest volcanoes in Iceland. There are also many active submarine volcanoes in the Taiwan Straits.