Roman Mars: I feel like over the years, we might have trained people to see the Houtongs and not the Great Wall or do both. 99% Invisible was produced this week by Delaney Hall, Jacob, Maldonado Medina and Kirk Holstad. The rest of the team is Vivian Lei, Christopher Johnson, Emmett Fitzgerald, Chris Perrupe, Wash Madon, Jason De Leon, Kelly Prime, Joe Rosenberg, Sophia Klatsker and Roman Mars. You can find the show and join the discussion about the show on Facebook.