There are two brand new dungeons coming with FFXIV's patch 3.1. Today, Square Enix pulled back the curtains on them both to give players a taste of what's to come.
Saint Mocianne's Arboretum and Pharos Sirius are both for level 60 players with an item level of 170 or above. While Saint Mocianne's is a normal mode dungeon, Pharos Sirius is a Hard Mode, but both are for traditional four person groups and both are expected to take 90 minutes or less to complete.
Read more about the dungeons at the official site for FFXIV.