Overhead power lines will be replaced by underground cables in parts of the New Forest, the Peak District, Snowdonia and Dorset.
The National Grid has set aside £500m for the project.
Environmentalist Chris Baines, who helped select the locations, said it had been a "difficult decision".
The four schemes have been prioritised out of 12 sections of electricity lines in eight national parks and areas of outstanding natural beauty (AONB) across England and Wales which were considered to have the most significant impact on beauty spots.