Something I like about the tunnels are the different sounds and smells one finds along the way. Sometimes it&#39;s the click-clack of ladies&#39; shoes on a marble floor; other times it sounds like a cave, complete with echo and dripping water. In parts it smells like garage, in others like breakfast - there&#39;s nothing like working downtown and getting to walk through historic buildings that smell like bacon and biscuits first thing in the morning.