I think my favourites are the Maya Lin piece and the one by Tara Donovan. I had never heard of Donovan but did some research. Here is a link to a wonderful piece made entirely styrofoam cups and you can read an interview with her here. Google her name to see many more images.
|Untitled by Tara Donovan (2014)|
|detail of Untitled by Tara Donovan (2014)|