Many people are confused about obelisk's location.
This is the exact location. not east fast travel point(not above the thot temple)
Looking down from obelisk, you can see the line.
Each line means 1 hour. so lines are marked from 5 am to 7 pm.
When shadow is between the middle line and the second on your left, do leap of faith!
p.s : screenshot is between 10 am and 11 am