There are so many of these texture and model upgrade mods, that it's well worth taking your time to do a little research to find out which ones suit your personal aesthetic style. Bethesda's own free HD Texture DLC is a good start, but mods like Pure Waters, Skyrim Flora Overhaul and the Static Mesh Improvement Mod can make the world look even more lush and deep than it is on its own.

Skyrim on its own isn't bad looking, but if you have the hardware to support it you should definitely consider some serious detail-oriented augmentations. And voila, no more cloning or cropping, just a sprawling, gorgeous screenshot. Once you're done, get the UI back by opening the (invisible) console and entering 'tm' in once more. Just remember that hiding the UI also hides the console, so to get things moving you'll have to hit '~' again to close the console. Accessing the console has the bonus effect of freezing the scene, so you don't have to worry about losing that perfect candid shot while you hide the UI. Hit the '~' key to access the game console, then simply time 'tm' and hit return. Unless you want to screw around with the clone tool in Photoshop, toggling the UI off is key.

Where are my skyrim screenshots