The Cathedral

The botafumeiro is hanging in the center of this picture. It takes 8 men to pull on the attached ropes to get it swinging from one end of the hallway to the other. 

Pilgrims would come and put their hand on this column, in the same place. It has worn finger grooves in the column. They do not let you touch it anymore. 

The famous bagpipes that play as you walk through the tunnel into the cathedral square: