I'm looking for examples of artist signage, particularly unique, structural, gateway signs at the entrance to a city or district. 

I hoping for a wide range and I realize that some examples may fall outside standard understanding of public art. Feel free to send any examples to me directly, if they may not be of interest to the entire listserve (aaporte4@asu.edu)! This is for an interdisciplinary, graduate student consulting project for a BID (Business Improvement District).