A "Volcán" is a geological formation that occurs when molten rock, gases, and ash escape from beneath the Earth's crust. This process creates a vent or opening, allowing magma to rise and erupt, forming a mountain or hill over time. Volcanic eruptions can vary in intensity, producing lava flows, ash clouds, and pyroclastic flows. Volcanoes are often found at tectonic plate boundaries, where the Earth's plates interact. Famous examples include Mount St. Helens in the United States and Kilimanjaro in Tanzania. They can significantly impact the environment, climate, and human activities, both positively and negatively.