Measured from the seafloor, the Maunakea volcano is the tallest on the planet. Next door Maunaloa… “long mountain”… is the most massive mountain on the planet. It is slowly settling into the crust, and we have small 2.5 earthquakes almost daily.
See… you weren’t careful! 🙂
There is an access road to the telescopes at the summit. One has to be very careful and access is now restricted. But I have been up there several times. They recommend stopping at the visitor center at 9,000 ft elevation for 30-45 minutes minimum to acclimate to the altitude. Even just sitting in a car, it is a ‘gasper’ at the summit.
But I love mountain-topping. In my 20s I climbed Mt. Sneffels in Colorado at 14,156 ft. I know the insane breathing management it takes to crawl up a wall at those altitudes.