Akashi Kaikyo Bridge, Japan

The Akashi Kaikyo Bridge, completed in 1998, is the world's longest suspension bridge, featuring a central span of 1,991 meters—nearly twice the Golden Gate Bridge's 1,280-meter span at #1. Costing ¥500 billion ($4.3 billion), it survived a 7.2-magnitude earthquake in 1995 that shifted its towers 1.3 meters apart, requiring a redesign that added 3% to costs. The bridge carries six traffic lanes across the 3,911-meter Akashi Strait, 30% longer than the Millau Viaduct's 2,460 meters at #2. Its steel cables total 300,000 kilometers in length, enough to circle the Earth 7.5 times. With a total length of 3,911 meters, it outperforms the Sydney Harbour Bridge's 1,149 meters at #3, making it 240% longer and a testament to seismic engineering resilience.