Fantastic. I have been through Zagreb in my travels but was not able to stay, unfortunately.
And yes, the dream was of a place called Woodbridge in Southern California, where I grew up. There was this long green belt with a forest on either side and a gully down the center with a small stream running through it. This place showed up repeatedly throughout my youth and though it wasn't real it had all of the most familiar elements of my memory, kind of condensed into this small environment. I was never in my body in this place but watched myself from the other side of the gully. There was a very large, dark tunnel at the end of the gully that water ran into. I would often see strange, Victorian lampposts lining the walk way and there was always a sense of both deep familiarity and the unknown.