Architecture Preview

 Angles and Shapes : The building itself is made up of different shapes and angles so this is a good photo showing that.

 Details: This is a close up of the Eiffel tower and it's a good detail shot because you can see the texture of the tower. 

 Light: This photo is a good shot of light, it sets a mood and makes it more dramatic.

 Patterns: The repeated shapes and colors is good shot of patterns of the building.

Surroundings: Even thuogh there is buildings on this image your main focus is the tallest one that's getting the light. The building surrounding this photo let the main one stand out.