Some years ago (OK, 25!) I was on a cruise ship sailing into Poros. Looking out at some very nice rich men's toys, I looked up and saw a grey fighting top of a dreadnought! The ship was just sitting there - afloat and apparently still in service.

OK, as I found out later, it was "only" a 1912 armoured cruiser. Nominally flagship of the Greek Navy, and moored at the Greek Naval Academy. It is now in the Pireaus harbour together with the trireme.