This is a reconstruction of the Palacio de Cristal in Madrid, Retiro Park.
How could I improve it?
Materials look plastic, improve them and it should look much better
Change the tree in low-left corner (either give it some more realistic leaves (needles) or choose different model). While this low level of details might work ok in the background, it doesn’t look good in the foreground.
I like the building, good work on that part.