Namsan (South Mountain)
Namsan is an 860-foot peak in Seoul that is a popular tourist destination for it's panoramic view of the city. A couple of years after we visited, it became the location of the N Seoul Tower, used for communications and observation. The location was presumably also used for a prior communications tower, judging by the presence of guy wires in the photos.
My father and I returned to this location in 1971, although the poor quality of the photos makes it hard to see the differences from 1967.