Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Megacity Construction Kit Free.
Mega City Construction Kit v1.6
Megacity construction kit.
Ultra HD textures 4096×4096 resolution. – 3 texture styles sets:
Daylight clear city,
Night cityscape
Abandoned city
-Over 300 custom objects:
skyscrapers, residential, commercial and industrial buildings.
-3 premade levels, prepared for use in game development, renders
and animations.
-11 High resolution cityscape skyboxes
– 180 custom buildings for constructing urban scenes:
59 residential buildings
43 skyscrapers
29 historical buildings
28 industrial structures
31 commercial buildings
7 healthcare structures
3 museums
3 gas stations
car parking lot
over 150 other misc objects : Highway junctions, road blocks,
traffic lights, road signs, billboards, lamp posts.
8 1024×1024 .TGA textures for all buildings.
+7 1024×1024 .jpg Specular maps for advanced environment and
specular mapping visual effects.
Triangles count:
level1 – 39240
level2 – 27948
level3 – 12626