Marie-Lucie  told me about this goat tower.  It’s at a South African vineyard:

It was built in 1981 with room for six or seven goats.  There are more pictures of the tower & its residents, as well as a short video, here and you can read about the herd here. I’m sure that goats would love to live in a tower; I wonder if there are fights about who gets to live at the top?  Perhaps the goats climb up every evening, stopping when they reach the first empty room; though that kind of order seems too fastidious for your average goat.  Although there are 750 female goats, it’s only billies who live in the tower, I’ve no idea why.  It could be that the males prefer sleeping on their own; we’ve never kept males, so I don’t know.

Since 1981 more goat towers have been built; there’s one in Norway and one in the United States.  There was a recent outbreak of serious illness at the Norwegian one, I’m not sure if it’s still going.  The American farmer who built his own goat tower claims to have the tallest goat tower on earth: thirty-one feet to its peak, with the potential to install a revolving observatory in the roof (I’m guessing we shouldn’t hold our breath waiting for this, for some reason he just seems to be preoccupied with not letting birds roost in the roof).  I like the South African one the best, they are milking goats (it’s the only one where your landlord doesn’t end up eating you). Here are some more milking goats who live, if not in a tower, at least upstairs.

One interesting structural feature that the American man mentions is that his steps are made of (sort of) reinforced concrete, which stiffens the tower sideways against the wind.  He used 5,000 hand-made bricks, no two of which are alike.  It’s not clear to me that there is any advantage in that.

The first three look exactly the same.  I think the next builder could work on the appearance of his or her goat tower.  There are precedents for this building type: