I can see a scenario where anyone could find any Landscape in the world 'boring' if spent looking at it long enough and shooting it in the same manner repeatedly. The subject itself is a bit of a minefield so I hope I can articulate this well, but I think the original question in the context it was meant is quite easy to answer - if you're finding the UK landscape 'boring' it says more about what you're trying to achieve with your photography by even asking the question in the first place. The bog standard answer is visit the Dolomites, Iceland, Alps, Canadian Rockies etc they're all much grander places in terms of scale and to look at purely as a tourist, but as @Nick Livesey says you're never going to produce anything beyond very superficial level images which don't really have much meaning, this method might eventually become 'boring' too (I know it would for me) if you do it long enough. Shooting big grand scenes from the roadside and well worn spots is beginner-level stuff for the most part and not at all challenging - give any landscape photographer who knows a grain about what they're doing and they'll come back with something half-decent. Personally-speaking the 'exciting' part of landscape photography is trying to produce work which I can connect with and that challenges me, the subject matter is only maybe 50% of the process and becomes less and less important to me over time. But that's how I view it - you may have completely different aims and goals for what you want to get out of your own photography. Ultimately all you have to do with photography is please yourself.