The Lunar Pyramid
From Destinypedia, the Destiny wiki
The Pyramid is the name used by Eris Morn and the Ghost to refer to a seemingly derelict alien vessel located below the surface of the Moon. This vessel is a remnant of the fleet of pyramid-shaped ships that attacked the Sol System during the Collapse, and which is affiliated (or synonymous) with the Darkness.
Layout
The Pyramid can be accessed by an opening on one of its upward-facing sides; this opening can produce a tractor beam to bring objects or visitors inside.
The interior of the Pyramid appears to have been designed with human-scale inhabitants in mind, and contains many hallways, stairways and various open spaces. It is dimly lit, with occasional harsh white or red lighting providing the only illumination.
Among the most notable objects found within the pyramid is a massive sculpture, apparently of a humanoid figure draped in what appears to be a veil or shroud. It is currently unknown what this sculpture represents.