How can I get very vivid colors in night cityscape pictures?

Can you suggest me what kind of settings would I need to make these kind of pictures.

The scenario will be just like the pictures: Outdoors, lights on the streets, and maybe very small rivers with houses and lights on each side. Just like Venice or Brugge in Belgium.

http://www.hdwallpapersarena.com/wp-content/uploads/2012/08/The-City-Night-Lights.jpg

http://cyclingtipscontent.s3.amazonaws.com/wp-content/uploads/2012/01/brugge.jpg

http://upload.wikimedia.org/wikipedia/commons/thumb/0/09/Bruges_-Quai_Rozenhoed.JPG/800px-Bruges_-Quai_Rozenhoed.JPG