World's most intricate subway networks | Geoengineer.org
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Chen Weihua （陈卫华） on X: "Beijing has the second longest subway system in the world. As of 2023, the country with the most metro systems is China, with 45 in operation. Truly
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Study shows subway systems develop in remarkably similar ways
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What are the top ten most beautiful and architecturally artistic underground subway systems (metro) in the world? - Quora
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11 Largest Metro Systems In The World - Leads 2 Business Blog
List of metro systems - Wikipedia
Metro / Subway Rapid Transit System
World's most intricate subway networks | Geoengineer.org
World's Longest Subway Systems in the World - YouTube
The World's Best Subway Systems in 2023 | Essential Living
The top 10 busiest metro systems in the world - Intelligent Transport
NYC's subway system has most stations in world - New York Business Journal
