When the streets line up, they create a cityscape.

街並み usually refers to a developed, urban cityscape — imagine rows of buildings and shops with a lively, bustling feel. It can also be used for specific streetscapes, often with a distinct atmosphere or some kind of historical or cultural significance, like ヨーロッパの街並み (a European streetscape).

You'll also see it written as 町並み, but this version tends to be used for quieter, more residential townscapes — often with a slightly sleepy, nostalgic vibe.

This is a combination of the words 街 and 並, which you've already learned, so you should be able to read this word too. Just be careful with 並, since the み in なみ is sticking out at the end.