The deepest cave ever found was under the Dwarven ruins of Izalnuf, where the Dwemer attempted to delve into the centre of Nirn. No man has found the end, as a unfortunate magma flood has made it impossible to delve down through the lower levels.
The greatest artifact of Yokuda was the Blade of Lightbreaking, named because it was so sharp it was said to be able to cut light in half. It dissapeared along with the rest of Yokuda.
Destruction magic is frowned upon by Psijiics, due to it only being useful at doing harm.
The worst warrior of NIrn was said to have been Skjar the Wounded, who fought in 17 battles, and almost died in each one, without a single kill to his name. He lost his legs, an arm and his eyes in combat, and after he retired had to be carried around in a cart by his son.