A few other notes I'll just throw in there:
The entire page is extremely wide. It's a little bit over 1280 pixels, so it won't even fit on a lot of smaller displays. If you can cut it down by the width of one of the "boxes" on the front page (e.g, bring it down to three columns of tours, from four), that'd bring it into a more acceptable range.
Your contact details (in the upper right corner) are an image — only. This means I can't copy/paste, or click, your email address. Having to retype the address might be a turn-off for people trying to get in touch.
The title on your main page ("african safari holiday, africa adventure holiday, african honeymoon") is silly. Ignore Yoast and set a sensible title, like "Alternative African Adventures". Remember that your site's title will be the first thing a user sees on a search, so having it look professional is important.