Top 15 Humanity's Costliest Builds Unveiled

1. California High-Speed Rail

Where: USA, California * Total Outlay: About $100 Billion Year Completed: Mid-Twenties Although work on the California High-Speed Rail may have started in 2015, Assembly Bill 3034's approval by the state assembly and Governor Schwarzenegger's signature in 2008 marked the beginning of the project's seven-year journey. The California High-Speed Rail Authority awarded the contract to the engineering firm WSP USA, and the railway's plans got under way.

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Pinterest, Guillermo Alvarez Calderon and California High-Speed Rail Construction problems have caused a delay in the Initial Operating Segment's scheduled opening, which was supposed to transport passengers around the bay area. Phase 1 of the High-Speed Rail is expected to be finished by the early to mid-2030s and will take travelers two hours and forty minutes to travel the three hundred and eighty miles from Union Station in Los Angeles to San Francisco.

2. Kashagan Field

Place: Kazakhstan Total Expense: +/- $166 billion Year Completed: 2040s With about 38 billion barrels of crude oil in place and 13 billion barrels potentially recoverable, the Kashagan Field, which was discovered in the northern part of the Caspian Sea in 2000, is regarded as one of the largest discoveries of the last thirty years. The People’s Republic of China’s President Xi paid $5 billion for an 8.4% share in the fields in 2013. Given that it is anticipated that the Kashagan Oil Fields won't run out until the 2040s, the transaction should be quite beneficial for Xi.

Shutterstock, V. Baturin, and Kashagan Field Because of the low depth of the waters near Kashagan, it is difficult to access the deposits located over 5,000 meters below the surface. Additionally, workers are required to carry emergency breathing equipment in case of an emergency because the oil contains a high percentage of hydrogen sulfide.