Use the big square map - 'M' key on the keyboard. The small mini-map won't until you get close.
Once the map is open you have to zoom in far enough for the location names to appear.
An example : http://www.ffxivinfo.com/maps/central-shroud.php
On this map, approx centered left/right , 1/3 way down from the top, there is "The Matron's Lethe". NW of Bentbranch Meadows.