The Millau Viaduct
The Millau Viaduct is a cable-stayed bridge that spans the Tarn River Valley in southern France, and is the tallest bridge in the world. The bridge is 343 meters (1,125 feet) tall at its highest point, and 2.5 kilometers (1.6 miles) long. The engineering challenges of the Millau Viaduct included designing and building the massive pillars and cables, and ensuring the stability of the bridge in high winds and seismic activity.
The Large Hadron Collider
The Large Hadron Collider (LHC) is the largest and most complex particle accelerator in the world, located in a 27-kilometer (17-mile) tunnel beneath the French-Swiss border. The LHC is designed to accelerate subatomic particles to nearly the speed of light, and collide them to study fundamental physics and the nature of the universe. The engineering challenges of the LHC included designing and building the massive underground tunnels, creating powerful magnets to guide the particles, and developing sophisticated detectors to capture the data from the collisions.