According to World Architecture News, "Newspapers around Europe have been reporting on the scheme, which requires the city's canals to be drained to allow the construction of a vast underground mixed-use complex beneath."
It's an idea by Zwarts & Jansma architects, whose plans includes excavating "a range of underground facilities... at various levels below the city."(to find out more..)
it is reported that the Amsterdam city's council has approved this project, and the construction is to start at 2018 lasting up to 20 years. We shall wait and see then.The Underground Amsterdam City~
image & passage from:
posted by midori mizu