oubliette or down in the underground

An artist by the name of Biancoshock is converting disused manholes in Milan into tiny luxury apartments. In an installation called Borderlife, meant to draw attention to the plight of immigrants and the vanishing ordinary residents priced out of affordable housing in urban centres over gentrification, a functionally decorated suite of rooms is sunk down a series of rabbit holes. Be sure to visit the artist’s gallery found at the source-link up top.