The Forgotten Tunnels Under Washington D.C…(bizarre)

This video is about Washington DC’s mole man, Dr. Harrison Dyar, and the tunnels he dug over the span of twenty years. What do we know about this Smithsonian bug man aside from his scandalous personal life and his favorite way to pass the time? What happened to Dr. Dyar’s catacombs in Washington DC? Are they still in use today?