Is there any way to destroy watchtowers?

[Encaitar]

It would be nice to be able to take down watchtowers. Because there have been times when I've wanted to build a fort near where a watchtower already is, but can't because of the watchtower.

[hoom]

I've got a permanent fort that my Carthaginian forces won off the Romans early on.
I didn't want it then (just wanted to kill the army) & I still don't want it but it won't go away.
There's an epic battle there from that victory but I can't see the details because it just says 'Carthaginian fort'

[Oaty]

I guess some kind of bug because if the A.I. abandons a fort it dissapears