空思想

Among the several U.S. and Canadian cities offering "Greeters Programs" (free walking tours provided to visitors by public-spirited volunteers), the Chicago program ( www.chicagogreeter.com ) is among the oldest and certainly one of the most eagerly promoted; enthusiastic comments by people who have received these free walking tours are evidence of a well-run program. Now, the program has undergone an expansion -- to include free bicycles and bicycle-riding guides as the way of enjoying such a look at Chicago.