Menachite portal complex

The Menachite Forerunner Complex is an underground facility built into Menachite Mountain by the Forerunners to house the Forerunner Crystal.

Layout
The outside of the complex resembles granite rock, with passages allowing access along the wall. The wall has a long stretch of glyphs trailing along the wall that twist into a spiral mosaic and vanish into ever-smaller curls. The glyphs are part of the wall's material, described as being composed of glittering mica inclusions in the granite matrix. The glyphs themselves are a series of squares, triangles, bars, and dots, and blur out of focus when someone looks at them directly.