We had a great field trip with the fourth graders to Seattle. Our first stop was the Underground Tour, which is a fascinating look at early Seattle. Since the city was founded by folks from Illinois and Iowa, they didn't take into account the tides coming in twice a day. So after the fire of 1898, the whole town was rebuilt 12' higher. There are remains of the buildings and sidewalks still at the original height. The following pictures show glass (the manganese turned purple) that let filtered light into the sidewalks below. This is the same glass grate, from above, and underneath.
Then we hit Pike Place and found the gum wall! The theater originally disallowed gum from being chewed in the house, so people began placing it on the wall outside. This is actually cleaned once a year!