A giant sculpture in the shape of a human head has been unveiled in the water of Botafogo Beach in Rio de Janeiro.

It's the latest work from Spanish artist Jaume Plensa and it is part of the "Other Ideas for Rio" exhibition, officially opening on September 7.

The exhibition will feature other international artists at some of the city's main landmarks.

The aim is to bring art to people who wouldn't otherwise get to see it because of the rush of city life.

People welcomed the new addition to the beach, including resident Sonia.

"The first time I passed it I was on the bus and I thought it was very interesting. Now I came to see it up close and it's really nice. It gives another look to the beach, which has been neglected," she said.

The "Other Ideas for Rio" exhibition will run until November 6.