The Earthscraper by BNKR Arquitectura is an architectural proposal for a massive inverted pyramid that would be built beneath Mexico City’s Zocalo square and would extend 65 stories underground.
The design is an inverted pyramid with a central void to allow all habitable spaces to enjoy natural lighting and ventilation. To conserve the numerous activities that take place on the city square year round (concerts, political manifestations, open-air exhibitions, cultural gatherings, military parades.), the massive hole will be covered with a glass floor that allows the life of the Earthscraper to blend with everything happening on top.
(Link)
