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Longest things in the world by category

Canada tops the coastline board at 202,080 km and the Great Wall of China holds the wall category at 21,196 km, and that's before you get to the ones that don't sound real. Singapore, New York covers 15,349 km as the longest flight route. Highway 1 runs 14,500 km as the longest national highway, with the Trans-Siberian Railway on 9,289 km behind it. Canada, USA is the longest land border at 8,891 km, the Nile the longest river at 6,650 km, the Great Barrier Reef the longest reef at 2,300 km, and the Grand Canal the longest canal at 1,794 km. Mammoth Cave goes 685.6 km as the longest cave system. Yarlung Tsangpo Grand Canyon sits at 504.6 km, Lambert Glacier at 400 km, Highway 10 at 256 km as the longest straight road, and Shark Bay Seagrass at 180 km as the longest plant. Danyang, Kunshan Grand Bridge is the longest bridge at 164.8 km, Kazumura Cave the longest lava tube at 65.5 km, Gotthard Base Tunnel the longest rail tunnel at 57.1 km, Hong Kong, Zhuhai, Macau Bridge the longest sea bridge at 55 km, Seikan Tunnel the longest undersea tunnel at 53.85 km, and Lake Pontchartrain Causeway the longest continuous bridge over water at 38.44 km. Lærdal Tunnel is on 24.5 km for road tunnels, the 1915 Çanakkale Bridge takes suspension span at 2,023 m, Central, Mid-Levels Escalator runs 800 m, Bach Long Glass Bridge 632 m, and the Bootlace Worm is the longest animal at 55 m. Credit to Guinness World Records, Britannica, CIA World Factbook, UNESCO and NPS (2026) for the numbers.

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Savage Updates@savageupdates

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Longest things in the world by category

Canada tops the coastline board at 202,080 km and the Great Wall of China holds the wall category at 21,196 km, and that's before you get to the ones that don't sound real. Singapore, New York covers 15,349 km as the longest flight route. Highway 1 runs 14,500 km as the longest national highway, with the Trans-Siberian Railway on 9,289 km behind it. Canada, USA is the longest land border at 8,891 km, the Nile the longest river at 6,650 km, the Great Barrier Reef the longest reef at 2,300 km, and the Grand Canal the longest canal at 1,794 km. Mammoth Cave goes 685.6 km as the longest cave system. Yarlung Tsangpo Grand Canyon sits at 504.6 km, Lambert Glacier at 400 km, Highway 10 at 256 km as the longest straight road, and Shark Bay Seagrass at 180 km as the longest plant. Danyang, Kunshan Grand Bridge is the longest bridge at 164.8 km, Kazumura Cave the longest lava tube at 65.5 km, Gotthard Base Tunnel the longest rail tunnel at 57.1 km, Hong Kong, Zhuhai, Macau Bridge the longest sea bridge at 55 km, Seikan Tunnel the longest undersea tunnel at 53.85 km, and Lake Pontchartrain Causeway the longest continuous bridge over water at 38.44 km. Lærdal Tunnel is on 24.5 km for road tunnels, the 1915 Çanakkale Bridge takes suspension span at 2,023 m, Central, Mid-Levels Escalator runs 800 m, Bach Long Glass Bridge 632 m, and the Bootlace Worm is the longest animal at 55 m. Credit to Guinness World Records, Britannica, CIA World Factbook, UNESCO and NPS (2026) for the numbers.

1h