Fire hydrant and survey markers

This is a fire hydrant. They are never free standing but are always built into walls or are flat on the sidewalk.

 The little spot on the sidewalk is a survey marker. It is on a bridge over the Naka River. The bicycle on the left was ridden by an old lady who stopped to see what I was doing. I guess she has not seen too many people taking pictures of the sidewalk.

Here is a closeup of the marker. You find find these on bridges and along the banks of rivers. They are particular important to show long term relative movement of the ground and structures. They are also extremely useful in determine exactly what happened after a major earthquake.