You cast your line into the waters of the Dragonhead latrines.

[Nalien]

It's not really a latrine, it's actually the most profitable fishing hole in Coerthas and some clever fisherman apparently spread a rumour that it was the latrine to deter competition.

His plan backfired, now hundreds of adventurers actually use it as a latrine. Primarily due to the complete lack of such facilities elsewhere in Eorzea.