on seeing just parts of this sculpture, it reminds me of a sculpture in cartagena..........i do not know if you actually saw it...........

it is called the hiding place and it is a memorial to the victims of ETA, especially those who were kidnapped..........

ETA was a spanish terrorist organization very active from the last years of franco dictatorship to the early 2010s....................

https://www.flickr.com/search/?user_id=24302895%40N00&sort=date-taken-desc&text=zulo&view_all=1