GeoGraph - photograph every grid square

This is the oldest surviving functional mechanical clock in the world. Designed to ring the clock in the bell tower (long since demolished) once an hour, the right side of the clock is the part that keeps the time and the left side was the side that rang the bell. It also has a small dial that indicates the hour.

Rediscovered in the 1930s when it was described as a pile of junk in one of the cathedral's roof spaces, it now resides in the main cathedral navae and is still in fully working order - though the side that rings only does the motions and these days has no bell to ring.

Unlike many other clocks that have survived from around the same period, it is still made from largely its original components.