100 Best Kept Secrets in Missouri Author:Ann M. Hazelwood Boring weekends just got kicked into overdrive. With an introduction by Governor Matt Blunt, St. Charles native Ann Hazelwood dishes 100 Best Kept Secrets in Missouri. So go ahead, visit Missouri s only castle open to the public in Springfield, find the Spook Light in Joplin, or visit the Mastodon State Historic sight just 20 minutes from dow... more »ntown St. Louis. This guide to Missouri s hidden tourist treasures also includes regional maps, guides for all attractions listed, and contact information.« less