Wakey wakey

Notable dormant volcanoes include Yellowstone in the United States, and Toba in Indonesia.

Yellowstone is perhaps the most famous, with a massive caldera spanning 30 by 45 miles, formed during its last major eruption approximately 640,000 years ago.

Toba, known for its eruption around 74,000 years ago, is the largest volcanic eruption recorded in the past 2 million years and is believed to have had significant global climatic impacts.