Guild Wars 2 Chest Farming: Wayfarer Foothills
Teleport or run to Hero's Moot WP and run east beyond the river up to Kresdor Kenning.
Kresdor Kenning is a Jotun camp. At the top of the hill once you reach that area is a short cave.
Battle the Jotun in the cave. In the middle of the room is a basic chest on a stone platform guarded by 3 or 4 Jotun. You can easily jump to the chest and loot it after the Jotun are killed.
Teleport to Outcast's WP in the south of the map by Outcast's Cleft.
Head south towards the Sons of Svanir camps, at the top of the hill there will be a large camp that is the entrance of a cave.
The cave is a short tunnel, just a little bit longer than the Jotun cave, and there's a group of 5 or so Sons of Svanir at the end with a giant dragon totem. The chest is behind the veteran son os svanir by the wall.
Teleport to the Osenfold waypoint on the west of the map.
Walk northwest towards the Jotun camp. There will be a lot of potato gathering nodes you can use as a reference for where the camp is, there are potatoes along the walls of the camp and on the outside.
If you already harvested the potatoes, you already know where the camp is. If they haven't spawned, just walk in the north west direction (more north than west) and you'll be in an area that spawns Jotun. To the west there will be two Jotun guarding a high-wall enclosed camp.
Inside the camp are about 10 Jotun, so I advise either the standard high DPS AOE damage or going around the camp and killing them two at a time while trying not to aggro the rest of the camp.
In the north part of the camp is a veteran guarding a basic chest.
Teleport to Halavaunt WP.
There are two ways you can get in to this splendid chest, but it is guarded by a Veteran sons of Svanir and a group of regular sons of Svanir.
One way is to head directly east to the Wurmhowl Spikes and fight through the few Sons of Svanir and additional Veteran son. But be careful, they spawn fast and aggro very easily so be sure you can do sufficient damage quickly to avoid a respawning nightmare.
Another way is to head south and east and jump down the cliff to the other end of the camp where you'll only have to battle 2 guarding Sons of Svanir and then the large group guarding the chest. The whole group aggros, so you can't take them out one by one. If your attack style involves high mobility, be careful not to aggro the Sons on the other side of the camp.
The map path in my album on the side shows both paths.
The jumping puzzle of the Wayfarer Foothills, no hidden chests, but the puzzle is considerably easy, just jumping and avoiding the red rings and fighting transformed animal priests.
Here is a video of a walkthrough of the jumping puzzle that should help you jump through it to get to the grand chest at the end.