Electricity pylons
The top wire is an earth link. Lightning will strike it before the main HV cables, as it protects about a 30 degree arc under it for a short distance, like an umbrella.
The others are simply the 3 phases, doubled up as network capacity/demand increases. Steel core aluminum cable, three phases each side. Check to see if the insulators are the same size side to side, sometimes they run two different voltages to different substations on the same pylons.
Most distribution systems only run the 3 phases to the destination substation transformer where the primary is Delta wound - ie no required neutral.