The ravine stretches several kilometres. Years of soil erosion have caused devastation in the Republic of Congo's port city of Pointe-Noire.
What started as gullies has now grown into ravines, swallowing more homes and farmland every year.
You see this house? That's where we used to live but we lost everything," said Ngombi Jacque, pointing to the spot where his house used to stand.
Residents blame the unfinished project of building dikes to evacuate waves from the Atlantic for aggravating the problem.
But authorities say the area's sandy soils easily erode. The city's environment officer also cited construction and settlement in prohibited areas as having made soil erosion worse.
"Our soils are victims of leaching of mineral elements from the soil. 100 years are needed for a soil to reach maturity", said Aimé Gérard Loembat, who heads the environment office in Pointe-Noire
Sandra Tchinianga, an architect and urban planning expert, has devoted much of her research to erosion in the city and has published a book warning of further ecological damage.
"Pointe Noire is a city that has grown suddenly, without the infrastructure following. People have settled in areas intended for livestock and agriculture," she said.