The project covers more than 9.3 hectares taking in the park and the Ben Thanh underground station, as proposed by VinSpeed, the rail company under conglomerate Vingroup, whose chairman Pham Nhat Vuong is the richest person in Vietnam and Southeast Asia with a net worth at about $33 billion according to Forbes.

The first of two subzones would hold an underground complex of up to four levels totaling nearly 318,000 sq.m of floor space.

Retail, services and amenities would take almost 145,000 sq.m of that, parking about 147,000 sq.m. The rest would go to the station, offices, an operations center and technical rooms.

The mall would sit immediately below the park, opening onto the station, the parking levels and a network of entrances.

Plans call for shops, restaurants, entertainment venues and public amenities, with skylights and planting to carry daylight and air underground.