I'm stuck on 14/15 landmarks and I don't know what to do. The only place on the map I haven't been in is a cave in the southern part of the map where you fight the dragon which is blocked by a large rock.
I have no idea how to break it and REALLY want to know how to move it for completion of the map!!
There is no landmark in the cave blocked by that rock (which will be removed once you kill the dragon, but apparently resets if you leave the area afterwards). Here are the landmarks. Tell us which you're missing (eliminate the ones you've discovered by putting your cursor over the X for each claimed landmark on your map) and we can tell you where it is:
1. Griffon Wing Monument
2. Gates of Andoral
3. Gates of Toth
4. Zhores Tower
5. The Surveyor
6. Lamarr Tower
7. Shortcut
8. Shimmer Stone Mine
9. Ritual Tower
10. Lost Idol
11. Hidden Stairway
12. Tesoro Tower
13. The Old Well
14. Echoback Fort
15. The Last Step
16. The Thing in the Dark
If you have cleared the map (even without that cave), you should be able to check it to look for question marks or landmark icons (the orange triangles). TBH, though, I forget whether you have to be nearby at the time or just have passed it previously for those icons to show.