LOL!! When we went out to Yellowstone year before last, they had just noticed the bulge in the lakebed. One of the days we went into the park, a couple of the areas on the east side of the park were closed because the ground was getting too hot!
The caldera location is marked on the park map, but you don't even need that to see it. There is a noticeable change in vegetation and ground color when you're over the caldera compared to just outside the boundaries of it.
We're all gonna die! We're all gonna die!