Most of the forested and border areas were controlled by communist insurgents in years gone by. Many of what we now enjoy as National Parks in Thailand were once no-go areas as a result and were the scene of lots of anti-insurgency operations. Thailand seems to have had plenty of border disputes and battles with warlords of one sort or another down the years. I'd guess it's a hangover from those times.
The National Grid said Abergeirw in Gwynedd was the last village in its network area to be fully connected.
The last of 95 poles stretching five miles (8km) was erected earlier this month, meaning residents will enjoy their first mains-powered Christmas.
Gary Evans, of ScottishPower, said constructing the supply line had thrown up "many challenges".
I can see why it took so long if it was connected by Scottish-Power; isn’t there a bit of the Irish sea between Scotland and Snowdonia?