A dark constellation of roads and tunnels stretches under the surface of America. Sounds of strange machinery echo up from the depths. Are there secret underground bases in special locations across the nation, even under the Penny Royal? And is there a dangerous  subterranean narrative rising from below?Special guests featured in this episode are Adam Gorightly, Walter Bosley, Dan Dutton, Jessica Yi, Kevin Newsome, Jason Andrews, Ryan Burns (Intro), and Wren Collier. Penny Royal is produced and written by its host, Nathan Paul Isaac. Associate producers are Darian West and Kyle Kadel. Edited by Boone Williams. Soundtrack by Phillip Claunch. Sponsored by Jarfly Brewing Company and the International Paranormal Museum and Research Center.If you'd like to support Penny Royal and join the mystery, become a member of the Liminal Lodge at www.patreon.com/pennyroyal.For more information, please visit our contact page at www.pennyroyalpodcast.com.