Banner for Facebook, Twitter and website

As banner for on our Facebook page, our twitter page and for on our website we need a banner created. We are going to setup a website on where any visitor can get to see things to do. Think about for children, playgrounds, amusement parks, swimming pools, etc ... For couples, shopping, romantic diner, shopping, etc ... For woman, sauna's, barber, nailsalons, shopping, etc ... And much more! For this we need a nice banner created that shows this! We where thinking about a banner on where from left to right you can see children playing, couples shopping, woman under a tanning boot, etc ... Using nice fading background so all seems to be going over in one another. Also we want to highlight romantic things to do like a romantic diner or romantic night in a nice hotel. Also going out at night and company drinks or something like that and the chalange is to get as much information as possible into 1 banner and still having it look very nice. For the background we where thinking of having an outdoor image with a clear sunny sky, nightlife, inside a swimming pool or whatever (these are just suggestions to try to explain as good as possible what we are looking for) fading in to ech other. Above is just a very global idea so exact things to show within the banner will be discussed with the assigned designer and we also like you to give your personal input. The banner needs to be in a few different sizes. 1 as twitter cover 1 as Facebook cover 1 for at the top of our website If 1 size fits all that will also be perfect but the banner needs to look perfect on each page.