Quote from omegalfa on 11/02/2021, 14:00

We have in our possession since many years an absolute rarity title called Arte Rupestre no Vale do Côa.
This is a Portuguese commissioned and published by IPPAR (Instituto Português do Património Arquitectónico e Arqueológico) in 1995, a governmental institute and CITI (Centro de Investigação para Tecnologias Interactivas) was the selected company to make it to show in an interactive way Rock Art found in the Foz Côa Valley that you can discover here: Foz Coa Valley UNESCO World Heritage.

Read the article here.