The pilgrims leave Chronos Keep and descend the 661 stairs to the Time Tombs, which are glowing.
They're all approaching certain death. What would you do in their shoes? If you answered, link arms and sing "We're off to see the wizard," well, maybe you can go on the next Shrike pilgrimage (if there is one), because that's exactly what the pilgrims do.
Want to know what happens next? You'll have to pick up Fall of Hyperion and discover it for yourself.