1. Hong Kong-Zhuhai-Macau Bridge (HZMB): This is the world’s longest sea bridge, stretching for 55 kilometers and connecting Hong Kong, Macau, and mainland China.
2. The Fehmarnbelt Tunnel: This is a planned undersea tunnel that will connect Germany’s Fehmarn Island and Denmark’s Lolland Island. It is expected to become the longest immersed tunnel in the world, spanning 18.6 kilometers.
3. The Gotthard Base Tunnel: This is the world’s longest tunnel, stretching 57 kilometers beneath the Swiss Alps. It took 17 years to build and will cut travel time between Zurich and Milan by an hour.
4. The Istanbul New Airport: This is the world’s largest airport, covering an area of 76.5 square kilometers and capable of handling 200 million passengers per year.
5. The Dubai Water Canal: This is a 3.2-kilometer waterway that runs through the heart of Dubai and connects the Arabian Gulf to Business Bay.
6. The Panama Canal Expansion: This is a project that widened and deepened the Panama Canal to accommodate larger ships. It took nine years to complete and cost $5.4 billion.
7. The Crossrail Project: This is a new railway line that will run through London, connecting Heathrow Airport, the West End, the City, and Canary Wharf. It is expected to open in 2022.
8. The Three Gorges Dam: This is the largest hydroelectric power station in the world, located on the Yangtze River in China. It generates 22,500 megawatts of electricity.
9. The Trans-Siberian Railway: This is a 9,289-kilometer railway line that spans the entirety of Russia, from Moscow to Vladivostok. It is the longest railway line in the world.
10. The Golden Gate Bridge: This is a suspension bridge that spans the Golden Gate strait in San Francisco, California. It is an iconic engineering marvel and one of the most photographed landmarks in the world.