Spring of Serqet
A camp in the rocky hills of the Waset desert. Like other desert camps, it keeps the brazier right at the perimeter, totally unguarded.
Start by trapping the brazier, just in case. You can then use this vantage to pick off the watchtower staff.
You can choose to keep sniping, man the siege crosssbow here, or sneak around to the captain's tent (which does have shrubbery cover and a backflap).
Kill the captain (level 58, so don't just sleepwalk through the kill), and loot the red chest in his tent for location completion.
This is one of the five Sting in the Tale Achievement locations. There are also a large number of prisoners that can be freed from here.