These images show the disturbing statue of a young girl drowning has sparked concern after it appeared unannounced in a Spanish river last week.
The figure was created by Mexican hyperrealist artist Ruben Orozco and is called "Bihar", which is "Tomorrow" in Basque.
People walking by can see the stoic expression of a girl with brown hair and brown eyes looking up at the sky.
It was created for a campaign by the BBK Foundation - the charitable arm of Spanish lender Kutxabank - to encourage debate around sustainability.
Ruben told local news that the statue is to make people aware that "their actions can sink us or keep us afloat".
The 264-pound fibreglass figure becomes submerged and uncovered every day as the tides come in and out of the River Nervion.
The campaign says this is to reflect what could happen "if we continue to bet on unsustainable models" such as those who contribute to climate change.
Bilbao residents awoke to the girl's head last week after it was installed in the middle of the night.
Visitor Triana Gil said: "At first it gave me a feeling of stress when more of the face was out of the water, but now to me she communicates sadness, a lot of sadness.
"She doesn't even look worried, it's as if she is letting herself drown."
Maria, another onlooker, thought it was memorial and said: "I learnt today that's not what it's about, but I think people can each give their own meaning to it."
This is not the first time the artist's work has appeared by surprise in Bilbao
Two years ago his life-size statue of a woman sitting on a park bench, drove the conversation about the isolated lives of the elderly.
