It is possible that you will not notice the pyramid in the water at the first two photos.
Actually this is Sant Roma De Sau church and it was located in a village with the same name.
The church belonged to the village of Sant Romà de Sau, which was submerged along with the surrounding area when the reservoir was created to provide water for Barcelona and the surrounding regions.
The village had a long history, dating back to medieval times, centered around the church and agricultural activities. When the decision was made to build the dam, the inhabitants of the village were relocated, and the village was intentionally flooded.
During times of drought as now in 2024, the water level of the reservoir drops, revealing the church’s bell tower and sometimes even parts of the remaining structures of the village, serving as a reminder of the area's past.