A dense harbour wall pressed against a mountain ridge.
Hong Kong is a cliff of towers with hills behind it. The harbour wall is unusually dense: dozens of slim high-rises packed edge to edge, a few stepping or angling at the crown. A mountain ridge sits immediately behind, so the skyline does not fade into flat sky the way Dubai or Chicago does. There is rarely a single cartoon landmark; the identity is density plus topography. If the silhouette looks like a comb of skyscrapers growing out of a low mountain range, choose Hong Kong. Seoul has a distinct observation tower and one supertall; Singapore has a three-tower hotel. Hong Kong is the packed harbour.