So be it!

During the next two days of travel the landscape begins changes radically. As the river descends from the highlands, it carves its way through wonderful 100-foot-high cliffs of white marble. The scenery is dramatic, the clear waters reflecting the sunlit marble, creating a serene and mermerizing view.

It's the fifth day of your journey, the Sun reaches its highest point in the sky. You walk on top of the cliffs, the river flowing 100 foot down at your right. Suddenly, a faint sound can be heard, coming from a small nearby grove. Make a wits check to determine whether you notice it or not (Roll a six sided dice, if 4 or higher you succeed, if if 3 or lower you fail, and then subtract 1 becuase of your point of exhaustion).