Underground Jerusalem: an interactive journey
Jerusalem has vastly expanded in the 7,000 years of its existence. Including, in the past two decades, downwards.
Beneath the Old City, one can already walk hundreds of meters underground, pray in subterranean spaces of worship and see shows in subterranean caverns and halls. There are plans in place to dramatically increase this area – essentially, restoring the true ancient city beneath the visible one. Jerusalem 2.0, below ground.
By Nir Hasson, Haaretz
http://www.haaretz.com/st/c/prod/eng/2016/05/jeruz/01/