They looked happy because the day's walking was finished. They were also happy because that was the day they saw the beautiful bird. A condor, the famous bird of the Andes, few high above them in the sky that day and stayed with them for hours. Maggie was sad to see it fly away at the end of the day. "It was a very important bird for the Inca people, you know," said Xavier, their group leader. 'On lots of old Inca buildings you can see an unusual cross. It's unusual because it has three levels. Like this.' And Xavier drew the cross on the ground,