The Space Toilet!!!!
This is a ridiculously amazing public toilet on Pike Street in Seattle (I believe it was Pike) that looked more like an escape pod or an elevator to an underground bomb shelter than a toilet. This was possibly the greatest part of the entire trip. There is a picture below, but it was a completely cylindrical shiny aluminum tube on the side of the street with automatic doors that opened like they were straight out of Star Trek. Like with a little pneumatic hiss and everything. Once inside, this thing actually talked to you and told you that you had ten minutes to use the washroom at which point the doors would open automatically and you would be caught with your pants around your ankles. There was also a button to push in the event of an emergency that would contact 911.
Pretty much the greatest thing I have ever seen in my entire life.