The Channel TunnelThe Channel Tunnel that connects the UK to France is a tunnel that runs under the sea and is the second largest in the world. The construction of this colossal project initiated in 1988 by Eurotunnel and it took six years to complete and was first open to public in 1994. The tunnel has gone through a couple of setbacks such as a fire that erupted in 1996 and another incident in which illegal immigrants came to seek refuge in the United Kingdom. Despite the shortfalls, this tunnel has been hailed as one of the Seven Wonders of the Modern World. It took more than 4.65 billion pounds to realize the project, which was apparently 80 percent more than the proposed cost of the project!
Three Gorges DamThe construction of the Three Gorges Dam was completed two years ago, in 2011. This hydroelectric dam is built across the Yangtze River located in Yiching, Hubei and is the largest project that China has realized second to the Great Wall of China.
This dam has the capacity to produce 22,500 megawatts of energy which is by far the highest produced by such a dam in the world. Although the project has a lot of long-term benefits, nevertheless, it did result in the displacement of more than 1.5 million people due to the subsequent floods, apart from environmental degradation and destruction of historical properties. On the whole, this project is worth over $25 billion dollars.
The International Space StationThe International Space Station is the most costly objects that has been built on earth and would definitely overshadow technological and architectural marvels. This space station has been assembled in space and is a collaborative venture by Russia, United States, Japan, Canada and the European Space Agency.
This satellite has the distinction of being seen by the naked eye as it orbits closer to the earth. The project started in 2000 and was completed in 2010- hence, it took a decade to be realized although the proposal of the project was made in 1993. The cost of the project is near around $157 billion!