Tier 18 of the Dawning of an Endless Night Story Quest in The Secret World
If you’re only interested in power leveling and aren’t going to bother reading any of the lore, just run through to the end. Otherwise, take the time to read through all the lore and listen to all of the dialog. The story is amazing and you get to see some really cool things in this area. Note that there is no combat here, just reading and cinematics. Here are Screenshots of each lore location and the note that comes with it.