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Most expensive projects in the world
The world has seen many mega-projects, but not all have turned out as planned.
Let's take a look at some projects that have changed the lives of people and some that failed to get off the ground.
NOTE: Courtesy, Business Insider
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Most expensive projects in the world
Interstate Highway System
Country: The United States
Inflation-adjusted cost: $459 billion
Cost in 2006: $425 billion
Global rank: 1
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Most expensive projects in the world
International Space Station
Country: Not applicable
Cost to date: $150 billion
Global rank: 2
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Most expensive projects in the world
King Abdullah Economic City
Country: Saudi Arabia
Inflation-adjusted cost: $95 billion
Cost in 2005: $86 billion
Global rank: 3
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Most expensive projects in the world
California High-Speed Rail
Country: The United States
Estimated cost: $98.5 billion
Global rank: 4
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Most expensive projects in the world
Dubailand
Country: The United Arab Emirates
Inflation-adjusted cost: $76 billion
Cost in 2003: $64 billion
Global rank: 5
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Most expensive projects in the world
Songdo International Business District
Country: South Korea
Estimated cost: $40 billion
Global rank: 6
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Most expensive projects in the world
Kansai International Airport
Country: Japan
Inflation-adjusted cost: $29 billion
Cost in 1994: $20 billion
Global rank: 7
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Most expensive projects in the world
Hong Kong International Airport
Country: Hong Kong
Inflation-adjusted cost: $27 billion
Cost in 1998: $20 billion
Global rank: 8
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Most expensive projects in the world
Beijing-Shanghai High-Speed Railway
Country: China
Inflation-adjusted cost: $26.1 billion
Cost in 2008: $25.8 billion
Global rank: 9
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Most expensive projects in the world
Big Dig
Country: The United States
Inflation-adjusted cost: $23.1 billion
Cost in 2007: $22 billion
Global rank: 10
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Most expensive projects in the world
Toei Oedo line
Country: Japan
Inflation-adjusted cost: $23 billion
Cost in 2000: $18.4 billion
Global rank: 11
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Most expensive projects in the world
The Airbus A380
Country: France
Inflation-adjusted cost: $23 billion
Cost in 2005: $22 billion
Global rank: 12
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Most expensive projects in the world
Channel Tunnel
Country: The United Kingdom
Inflation-adjusted cost: $22.4 billion
Cost in 1994: $15.4 billion
Global rank: 13
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Most expensive projects in the world
The Second Avenue subway expansion
Country: The United States
Inflation-adjusted cost: $17.9 billion
Cost in 2007: $17 billion
Global rank: 14
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Most expensive projects in the world
The John F Kennedy Airport Expansion
Country: The United States
Inflation-adjusted cost: $12.7 billion
Cost in 2001: $10.3 billion
Global rank: 15