This desert oasis has seen a significant population rise. Phoenix, the capital of Arizona, is known for high-end spas and ...

Lagos in Nigeria is on track to become the largest city in the world by the end of the century, with a projected population ...

These massive cities are sinking into the ocean as climate change fuels rising sea levels all around the world.

Oklahoma's two largest cities made the biggest improvements in an annual ranking of the United States' Best Performing Cities ...