Choose images in Show tours of atribute widget

Hi,

I import demo 1 from theme, but i want to use a widget, like you have done in

http://travelwp.physcode.com/home-4

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I setup the background and set the widget Show tours of attribute, choosing destinations attribute, but the widget make as a example Brazil bigger than others and i cant find where the image of each country are set.

Plus the images that the widget auto generate are too small for the space, nothing like your example. See my capture image here https://1drv.ms/i/s!AjwGARCRTTRdgtskvJJWgVw6nhJNuw