A giant hippo was recently spotted floating on London’s River Thames! No, it’s not a freakish migration caused by global warming; rather it’s a work of art by Dutch artist Florentijn Hofman, who is famous for his scaled-up sculptures (like this gigantic Rubber Duck). The 21-meter-long HippopoThames was inspired by prehistoric mammals that once inhabited the river. The sculpture will remain on display at Nine Elms on the South Bank until September 28, 2014.

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The super-sized hippo continues the artist’s obsession with placing huge sculptures in public areas of major cities. His Rubber Duck floated its way across the globe, appearing in Los Angeles, Hong Kong, Abu Dhabi, Osaka and Sao Paolo, among other major cities.

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The HippopoThames was designed for the organizers of Totally Thames Festival that celebrates London’s famous waterway. The artist researched the history of the area and came across studies that revealed its pivotal role in the evolution of hippos. The giant sculpture is meant to reference the large creatures which populated the river thousands of years ago.

+ Florentijn Hofman