Burj Khalifa (Dubai, UAE): The tallest building in the world, standing at 828 meters (2,717 feet), known for its striking design and advanced engineering.
Great Wall of China (China): Although ancient in origin, modern restoration efforts have maintained this extensive wall that spans over 13,000 miles, symbolizing historical and architectural achievement.
Golden Gate Bridge (San Francisco, USA): An iconic suspension bridge known for its Art Deco design and impressive span of 1,280 meters (4,200 feet).
Panama Canal (Panama): A vital waterway connecting the Atlantic and Pacific Oceans, an engineering marvel that significantly impacts global trade.
Channel Tunnel (UK/France): Also known as the "Chunnel," this underwater rail tunnel connects the UK and France, stretching 31.4 miles (50.5 kilometers) beneath the English Channel.
Sydney Opera House (Sydney, Australia): Famous for its distinctive sail-like design, this performing arts center is a UNESCO World Heritage Site and a marvel of modern architecture.
Hoover Dam (Nevada/Arizona, USA): An impressive feat of engineering, this massive dam on the Colorado River provides hydroelectric power and water supply to the region.
Petronas Twin Towers (Kuala Lumpur, Malaysia): Once the tallest buildings in the world, these twin skyscrapers are renowned for their postmodern design and skybridge linking the two towers.