Audreyplant!
We think it is a giant agave, and at first we thought it was the same kind as the little normal agaves you sometimes find in people's yards here, so we were sort of frightened.
Here is a photo:
See? It is crazy-tall!
It seems to be an extra-big variety of agave, instead of just a mutant (there is a very cute article here, about an astonished lady whose agave grew a huge flower stalk all of a sudden).
Still, the first couple of times we visited the giant plant, I didn't want to stand too close in case the stalky part bent down and grabbed me (the top part with the bud looks very like a mouth waiting to open up).
Apparently, in a few weeks the stalky part will flower, and then the whole plant will die. This makes me sad. It will disperse lots of little tiny new plants, though, and I would like to take one and plant it somewhere.
It would have to be somewhere BIG, though. Hmm.
Anyway, that is my small adventure which involves a giant agave plant.