Well, if you don't really do wideangle landscapes (and don't want to) you do have upgrade options open to you. However, it's difficult to recommend anything specifically as you haven't said what camera (other than it's Nikon) and how much money you have/want to spend.
However, you could consider any of the following:
Nikon 16-35mm f/4
Nikon 17-55mm f/2.8
Sigma 17-50mm f/2.8
They're all optically much better than your 18-55mm kit lens but cover similar ranges. They aren't cheap though, especially the Nikon ones but the 16-35mm and 17-50mm are phenomenal lenses with top spec optics and professional build. The Sigma is part of their EX range (their top range) and is also a big step forwards from your kit lens.