American artists have drawn criticism after making stunning, intricate sculptures by pouring hot liquid aluminium into anthills.

A Hindu holy man on his way to the annual holy dip at Gangasagar, gestures towards a visitor as he rests at a transit camp in Kolkata, India, Wednesday, January 6, 2016. Thousands of Hindu pilgrims are expected to take the annual holy dip at Gangasagar, where the Ganges River reaches the Bay of Bengal, on the auspicious Makar Sankranti festival day that falls on Jan.14. (Photo by Bikas Das/AP Photo)

A woman reacts as colour powder is applied to her face on during Holi celebrations, amidst the spread of the coronavirus disease (COVID-19), in Ahmedabad, India, March 29, 2021. (Photo by Amit Dave/Reuters)

Tourists take a panoramic view of Kuala Lumpur from a skybox during a media preview at Kuala Lumpur Tower in Kuala Lumpur, Malaysia, 05 May 2016. Skybox, 421 metres above ground level will be the latest tourists attraction at Kuala Lumpur Tower, the 7th tallest freestanding tower in the world. (Photo by Ahmad Yusni/EPA)

A person holds a portrait of Alexander Lukashenko during an opposition rally in Independence Avenue in Minsk, Belarus on August 23, 2020. The political crisis continues in Belarus, which arose in connection with the presidential election held on August 9, the results of which are not recognized by the opposition. (Photo by Valery Sharifulin/TASS/Sipa USA)

Model Amber Rose attends the Maxim Hot 100 Party at the Hollywood Palladium on July 30, 2016 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)

Children carry firewood on their heads and walk homewards on the outskirts of Rae Bareli, India, Thursday, December 17, 2020. (Photo by Rajesh Kumar Singh/AP Photo)