Paul and I went to visit Coit Tower on Saturday. Our first time in almost five years living in the city! I knew this project would be good for us.
There is glass that surrounds the viewing level of the tower, but apparently visitors from all over the world have managed to slip coins from all over the world through the separations between the glass and the walls. Unfortunately the side with the best view/light had the least diversity of coinage, but if you look at the full size image you can see that the big one in the center is not U.S. currency!