On 26 June 1976, Toronto's CN Tower officially opened to the public. Fifty years later, it remains one of the most recognisable structures on the planet, with a well-deserved place on the American Society of Civil Engineers' Seven Wonders of the Modern World list. At 553.3 metres tall, the tower was built to solve a growing problem. Toronto's skyline was expanding rapidly, and broadcasters were struggling with signal interference caused by the city's new high-rise buildings.

From water systems to roads and bridges, ancient civilisations were solving infrastructure challenges thousands of years ago, often with nothing more than basic tools, clever design and a deep understanding of their environment. What's even more impressive? Some of these assets are still in use today. Here are our top 10 ancient engineering projects that have well and truly stood the test of time. 1. The Cornalvo Dam, Spain Built in the 1st–2nd century CE, this Roman dam st

You’ve likely driven past dams, admired flowing rivers or noticed hydro plants on project lists, but how did we get from simple waterwheels to massive renewable power stations? The story of hydroelectricity is one of innovation, adaptation and, ultimately, a major steppingstone in the world’s energy mix. From Waterwheels to Watts Long before electricity was a thing, humans used water for power. Waterwheels turned grain, pumped water and drove early industry. But it wasn’t unt