FFXII - Maps - Pharos - Third Ascent

Exit (80th floor, waystone) will return you to Pharos - First Ascent, 1st floor. The map might show an arrow pointing to Second Ascent, but I assure you - touching the way stone that brought you to the Third Ascent will take you right back to the start of the Pharos.

Map location: 79F, Spire Ravel 1st Flight. 79F is accessible via the Way Stone on 88F (just prior to the elevator) or by being ejected to the 79th floor for incorrectly touching the coloured Sigils