Dutch engineers have proposed building an underground city 6 floors under Amsterdam's picturesque canals, which would be drained section by section during construction.

It is both feasible and sustainable, creating a city beneath the city is not futuristic, it may be a necessity in this day and age.

And what will this city hold? Parking, shopping and "leisure".

Should they be digging up Amsterdam for parking and shopping, OR should they have added public transit and bike lanes instead?

Construction could last up to 20 years.