When I come to the first page it is not apparent what it is you do. There is no information, no direction, just your title and the list of links. I realize your title has 'foto' in it. But some visitors are real dummies, not just pretending to be a dummy.
The first link at the top is "Principal" so I click on it and nothing comes up. I suppose you are filling in that information later...
When I click on the other links (which turn out to be photos), the photo does not pop up centrally but below all of the links. This is wasted space. I suspect there is a problem with the orientation of your links. On my screen (Firefox) they appear top to bottom and the content appears below them. Perhaps it is meant to be left to right at the top and the photos appear centrally?
Your layout is very sparse. I suppose you want to highlight the photos. But initially, there is nothing attractive to make me want to go further unless I happened to click one of the links to the left. I advise you to start with a photograph since then it would be apparent what it is you do.