On a small island surrounded by hundreds of wooden huts on stilts, in the middle of Lake Nokoue in southeast Benin, a giant painting is taking shape.

Guillaume Legros, also known as Sype, painted vast joined hands in Benin as part of a chain of similar works around the world
Guillaume Legros, also known as Sype, painted vast joined hands in Benin as part of a chain of similar works around the world AFP / Yanick Folly

For the past three hours, in 41 degrees Celsius (106F) heat, French artist Saype has been busy transforming a playground in the floating village of Ganvie.

Shapes gradually appear on the grass in grey and black paint from the nozzle of his sprayer.

A white man is a rare sight in Ganvie village, let alone one creating a huge painting on the ground
A white man is a rare sight in Ganvie village, let alone one creating a huge painting on the ground AFP / Yanick Folly

Fishermen, women selling fish, and children from the village are gathered around him, observing the scene with wonder as a drone hovers above their heads.

"No one knows yet what this man is doing," resident Sonagnon Dagbedji says, his eyes fixed on Saype.

Ganvie village's houses are built on stilts in Lake Nokoue
Ganvie village's houses are built on stilts in Lake Nokoue AFP / Yanick Folly

The 33-year-old says he's seen paintings before in a local gallery, "but painting on the grass? That's a first."

It's not just the art attracting curious residents -- the artist himself intrigues many.

Legros says his giant hands are 'a symbol of kindness and goodwill between people'
Legros says his giant hands are 'a symbol of kindness and goodwill between people' AFP / Yanick Folly

"Seeing a white man coming to Ganvie to paint, that's an event in itself," said another resident, Sokin Agodokpedji.

"We were told the final result would be special so we are waiting," said the eager 25-year-old fisherman.

At last, the fresco is ready. Onlookers congregate to watch a video from the drone's camera on a small screen.

The strokes of paint have formed into two giant interlaced hands.

For Saype, whose real name is Guillaume Legros, this painting is part of "the largest human chain in the world."

The "Beyond Walls" project started in Paris in front of the Eiffel Tower and has over several years travelled around the world, reaching Andorra, Berlin, Geneva, Ouagadougou, Yamoussoukro, Turin, Istanbul and Cape Town before coming to Benin's floating village of Ganvie.

"We are at a point in history where the world is polarising, and where a part of people are more and more turning in on themselves," Saype wrote in a presentation on the project.

The interlaced hands are "a symbol of kindness and goodwill between people," he says, "to try and build bridges."