Originally Posted by sgd

It is at one of the visitor centres, but I cant remember the name of it.

I think the best way to desccribe its location is this:

From the cable car station / cafe come back down to the main road (so Teide is behind you at this point) and turn left, drive along there and it is on the left hand side further along.

Sorry this is so vague, but hope it points you in the general direction!