From 48- year construction schedules, to the most expensive single item ever built, the current global megaprojects are not only the “biggest buildings in the world ” but are beautifully futuristic .
Because successful megaprojects attempt to do something that has never been done before , those involved are generally highly criticised, and face alot of disappointment



Here are the nine largest megaprojects in construction right now, in order from most to least expensive:
1. International Space Station - $150 billion (as of 2010)

The most expensive single item ever built. Expansions beyond 2020 are estimated to eventually cost $1 trillion.


2. Al Maktoum International Airport - $82 billion

This airport in Dubai will be fully operational by 2018. It will be the world's largest in terms of size and passenger volume - so big that four jets will be able to land simultaneously.


3. South-to-North Water Transfer Project - $78 billion (as of 2014)

Thought the Three Gorges Dam was massive? This other Chinese megaproject is already nearly three times as expensive - it aims to divert water from the Yangtze River using three huge canals to bring it to the north of the country.


4. California High-Speed Rail - $70 billion

Spanning 1,300 km (808 mi), this will link San Francisco to Los Angeles.


5. Dubailand - $64 billion

This mega theme park project will open in 2025 in Dubai. It will also have the world's largest hotel (6,500 rooms), sports venues, eco-tourism, science attractions, and a giant mall.


6. London Crossrail Project - $23 billion

London is expanding its underground system, with 42 km (26 mi) of new tunnels to connect 40 stations. Everything will be complete by 2020.

7. Beijing Daxing International Airport - $13 billion

Opening in 2025, this airport megaproject will have seven runways and the largest terminal in the world. It will help ease the load on nearby Beijing Capital International Airport.


8. Jubail II - $11 billion

The second phase of development of the Jubail Industrial City in Saudi Arabia will add 100 industrial plants, an oil refinery, and one of the bigger desalination plants in the world.

9. Hong Kong-Zhuhai-Macao Bridge - $10.6 billion

A series of bridges and undersea tunnels to link the three major cities on the Pearl River Delta in China. Ultimately, it will be 50 km (31 mi) of links, opening sometime beyond 2021.

None in Africa? #normal

Dangote refinery cost more than 12 billion dollars. > 8 and 9.