360° panorama by Santiago Ribas - 360portugal.
Click the image to open the interactive version.

Highest point in mainland Portugal, where D. Jo~ao VI (1816-1826) ordered the erection of a stone tower, to complement the 2000m. From this point, the view reaches culminating points, from the Serra da Boa Viagem in Buarcos, to the Serra de Gredos in Spain, from the Mar~ao in Tr'as-os-Montes to the Serra de Portalegre in the Alentejo. In the 1950s, Air Force facilities were built, which housed the radar. They were deactivated in 1970. Currently, it is a sales center and information center.

https://www.360cities.net/image/serra-da-estrela-alto-da-torre-portugal