Hi Kawinthra,
Wow!! Both designs are very clean and professional! I really love the layouts for both of them, especially for the gallery page which divides Paul Nicklen's photos into key categories that the user can click through with ease. Adding a search icon above them in the first version fills in the space between the title on the right and the other pages on the left really nicely as well. My only suggestion for the first design would be to make the hamburger icon a bit bigger and bolder on the home page since it is really hard to see, especially on the mobile format. But other than that, this version looks like it is one final touch away from being a completed website look!
If you do go with the second version, my only suggestion would be to have the main cover image on the home page connected to/coming from the bottom. It feels a bit awkward with the tiny amount of white space underneath it, but I think if you scale the image up just a bit more it would resolve it in no time; maybe even filling up the entire space beneath the top row with the picture to be something like this:
.

Can't wait to see your final work!