Venice / Benátky
As many cities situated on water, the nicest images (and the most relaxed sightseeing) you get from the boat. Should it be the traditional overprices gondola (a part of the guild agreement is a standart price of 80 euros per half an hour), or the public water buses, it is definitely worth. Also, the city is the nicest very early morning (or very late night) hours, when the crowds of tourists grow weary. It is definitely worth taking a little hotel somewhere in the city centre, you get an unforgettable stay.