Check out Cologne Germany - city and urban 3D model on CGTrader for $3. High-quality mesh by JindaArch.
BLEND (Blender, filesize: 126 MB), OBJ (OBJ, filesize: 133 MB), FBX (Autodesk FBX, filesize: 67.1 MB), MAX (Autodesk 3ds Max, filesize: 233 MB), DXF (DXF, filesize: 461 MB), STL (Stereolithography, filesize: 75.3 MB), DAE (Collada, filesize: 247 MB)