I went to Kotor for a day trip from Dubrovnik which seemed near enough (actually the border control took us three hours!). The old town is indeed beautifully situated and has large well preserved fortifications which can be climbed on for an even better view of the bay (requiring quite a lot of effort though). The old town offers great Italian food and was otherwise quite disappointing after Dubrovnik. It is not that it lacks the beauty but that it is so very poorly maintained. I can actually think of no other WHS I've been to where I saw such dismay. One of the churches I saw was fully loaded with rubbish and weeds, its facade and roof were on the verge of distruction. I can see how it could be made more appealing by a careful reconstruction and I wonder why it's not being done with the financial aid of Unesco (apparently nearby Croatia and Bosnia are better off and had the means to undertake the renovations on their own).