On the border between the wetlands to the north, the Outback to the west and the fertile Murray-Darling basin to the south lies a monument to the hubris of man unlike anything the world had ever seen. A pyramid without a peak, measuring 210 metres tall, made out of grey-ish diabase (a type of igneous rock related to basalt). While not greater in height than the other two structures of the Trinity, the Obelisk is in reality the largest of these constructions by far; it is only the entrance to an enormous, seemingly endless network of halls, tunnels, caves and mineshafts connected to the Underdown, known by anthropologists as The Necropolis. The obelisk itself is quite grand in its interior structure, filled primarily with halls depicting the grandiose of the First Empire, its accomplishments, numerous offerings (the vast majority of which have been looted over two millennia), tombs, and even some additions from the Second Empire. Upon reaching its flat top, measuring 900m2, a mostly bare landscape is accompanied by a single statue of the last emperor in combat with a spear. Its inscription, only translated in 1957, says the following;

"May the land throw at us whatever it may,
be it monsters in the skin of men or creatures of (...),
the spirit of the warrior will prevail beyond death."