Meridian Bay is a Grimoire card from the original Destiny (Destiny 1), found under Places → Mars. Grimoire cards held most of the game's lore and were read on Bungie.net and in the companion app, not in the game itself.
Card text
Under the shifting sands of Meridian Bay are the ruins of the magnificent Freehold, a testament to the glory of the Golden Age. Great secrets remain hidden in its crumbling towers.
Grimoire text written by Bungie, shown as it appears in the Destiny 1 game files.