You may want to take a look at you js lightbox optin. It may not be set correctly, as it appears to popup "off screen."
Check the properties and make sure it's set to Position:Fixed.
That way it will always display in the center of the screen.
I like what you did. Very simple and understandable.
I'd consider removing the large site-wide logo which takes up a lot of space, and also cut it in half. This will make the user experience more intuitive and eliminate the need for the user to scroll down.
I'd also consider using some sort of lead generation tool on the right side of the upper header. An email form, a click to call feature, or a short video. Whatever works.
I've attached an image of the changes.
Insider Travel Tips and Guides for you who's Going to Copenhagen, Denmark
Going To Copenhagen
Insider Travel Tips and Backdoor Guides Exlusively for Copenhagen, Denmark
I'd also reduce the site-wide header image by at least 2/3rds. There is valuable site space that you aren't utilizing.
Move Private Policy, and the Contact/About Us page off the main navigation and put them in the footer. That will make more room in your navigation for travel specific links.
Consider changing the names of your navigation links to be more meaningful to the user seeking Copenhagen information. For instance, instead of Calendar, consider using terms like Events in Copenhagen, or something like that.
If you need help with any of that...let me know..
A couple immediate changes would make a better user experience.
1. Remove header image entirely. It takes up too much valuable space.
2. Place title of the site above the navigation links.
3. Remove most of the text you have on the from page and focus entirely on educating the user about your offer. I would eliminate 2/3 of the copy and introduce, and use a quick video to explain what your site is about. This will help people stay longer.