- Discover Chicago's most wonderful hidden gems in this alternative travel guide, part of the successful 500 Hidden seriesThe 500 Hidden Secrets of Chicago reveals 500 off-the-beaten- track places and interesting details for anyone who's keen to explore Chicago's best-kept secrets, e.g. 5 cafés for sitting a spell, 5 iconic merchants, 5 ways to enjoy the Chicago river, 5 unlikely art destinations, 5 historic music spots... and much more. The 500 Hidden Secrets is a series of essential city guides. Every guide is written by a savvy local, only contains independent advice, is based on thorough research and the author's personal opinions and is frequently updated and reissued.