Myamoto M.
Google
This is a must see if you go to Toledo. The Cathedral is astounding and magnificent.
You have to buy a ticket in front the entrance, in a little shop. It's I'll made, as you present yourself to the first counter, just to be told, a little curtly, that the tickets are sold at the second counter. The first one being for buying trinkets. Plus the entrance is not the obvious one, the big steps that are first seen when you arrive on the plaza. It is on the right side of the Cathedral, and we learn this by walking all around the immense building.
Take into account that you will need a good hour or more to really see all the nooks and cranies of the Cathedral, with all its beautiful art. Paintings, sculptures, bas-reliefs, gilded work, icons, stained glass, stonework, enluminures, etc... There are benches inside were you can pause, for people who need to rest.