It's actually part of the outer moat (Benkeibori) of the old Edo castle in Tokyo. Once upon a time it looked like this (second picture down) and this (third picture down).
Aside: Thanks for asking, as the Old Tokyo site I found and linked to above is quite fascinating...
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
no subject
Date: 2005-04-09 10:02 am (UTC)Aside: Thanks for asking, as the Old Tokyo site I found and linked to above is quite fascinating...