This episode explores Earth’s largest and most dramatic craters, formed by both asteroid impacts and volcanic eruptions. We journey from the Chicxulub Crater in Mexico—linked to the extinction of the dinosaurs—to the massive Vredefort Crater in South Africa, the largest confirmed impact site. We also examine volcanic giants like Yellowstone Caldera, as well as other remarkable formations such as Canada’s Manicouagan Crater and the Sudbury Basin. The discussion covers their geological significance, their role in shaping ecosystems and landscapes, and what they reveal about planetary history. Finally, we consider the potential risks of future impacts and the importance of studying these ancient scars to better prepare for cosmic threats.