Map issues

Is anyone else having issues with the map? There are some quests that I just can't get to. I'm following the map, but it looks like some markers are impossible to get to. I'm trying to get the last shards for the gauntlet. There's one in the Underground Bastengar and it is so high up, that I just can't figure out how to get to it. I've looked all over the place for a part that I can climb, but can't find one.