Tartessos building techniques were advanced

[Imperial Dave]

https://www.ancient-origins.net/news-history-archaeology/tartessos-culture-construction-0021529

[Jim Webster]

Interesting but why is anybody surprised. I would have thought 'People who's families have lived in an area for centuries know how to cope with local conditions' is hardly 'news'

It's a bit like the comment about using local materials. Not using local materials was a sign of great power and wealth. That's why it was such a big deal when a stone for Stonehenge might have come from Orkney. The ability to organise that shows immense influence and a lot of assets to deploy.