It depends whether the landscape you want to take is close or near. I took Mt Fuji with my 50mm lens but if I was nearer to a landscape, I would use the 18-55mm. Yes, 18-55mm is definitely good enough for a zoom lens! At least for travelling, that is. I didn't really zoom in on anything when I was using my 18-55mm. I myself have another kit lens that's 55-250mm and I have only used it once at a zoo. So yeah, I think 18-55mm works well enough!