The railway network is just one part of the infrastructure of Lagos
that has been unable to keep pace with the city's frantic growth.
In 1950 a mere 300,000 people called the Nigerian city home. But economic growth, fuelled by the oil industry, drew Africans from throughout Nigeria and beyond.
The city's population is expected to reach 18 million in the next two years, making Lagos one of the world's ten largest cities.
By 2025, a new UN report predicts, the city—along with Kinshasa, Democratic Republic of Congo—will join Cairo, Egypt, as Africa's only megacities.
But experts warn that expansion in Lagos was unplanned and has been largely unregulated, creating textbook examples of urbanization woes, including scarce housing, failed sanitation systems, and mounting pollution.
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Photograph by Utomi Ekpei/AFP/Getty Images