San Diego International Airport's runway apron basically forms downtown's northwestern border, so no structures are allowed to exceed 500 feet. This can give the skyline an plateau effect from some angles, but it also enforces some density that you don't often see in western US skylines. Thankfully, there is some diversity in architectural styles, so it's not completely dominated by walls of exposed balconies that you often find in other sunny locations. Furthermore, the topography is very attractive, with the skyline fronting San Diego Bay, and hills and even distant mountains forming the backdrop.
Bay, mountains:
The skyline plateau exemplified. Local topography + the Bay and Mexico in the distance
Somewhat of a (truncated) pyramid effect: