First of all...: Good job!
On the other hand:
I have a problem, the header image is always distorted.
In your picture of the beach is not very noticeable, but in any other image sufficiently appreciated.
What I can do to always keep the proportions of the image?
I've tried putting my picture in the same size as the original beach (1000x567px) ... but it works.
I hope you can help and thanks in advance