There are lots out there. Here are a few of my favorites.
Seattle is beautiful with Puget Sound and Mt. Rainier in the distance.
Anchorage is incredible for the ocean and the Chugach Mountains inland.
Many of the western Montana airports (FCA, BTM, MSO, BZN) have very pretty approaches as you descend over the Rocky Mountains.
I like LAX when approaching from the west, especially early in the morning. If you are looking north you get cool views of the Channel Islands. If you are looking south neat views of Catalina Island and Long Beach. Even more fun if they are landing from the west as they sometimes do in the mornings.
Zurich is also pretty impressive with the Alps all around.
Sydney is iconic with great views of the coast and the famous landmarks.