The calderas (craters) are so big and so old that you don’t really recognize them as such. The crater is ~40 miles across, that’s bigger than the base of many conventional volcanos.
Good map here: [https://en.wikipedia.org/wiki/Yellowstone_Caldera#/media/File:Yellowstone_Caldera_map2.JPG](https://en.wikipedia.org/wiki/Yellowstone_Caldera#/media/File:Yellowstone_Caldera_map2.JPG)
Super volcanoes don’t really have the shapes of ordinary volcanoes like Mt. Fuji or Mauna Loa, which are built up by repeated eruptions that pile up layers of lava and ash. They’re more of a one-and-done phenomenon, so you’ve got the crater without the mountain.
https://en.wikipedia.org/wiki/Supervolcano
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