Really enjoyed the tour. Nice balance of information, dry humor, and different media (buildings, underground bricks, I-beams, historical and contemporary architectural designs). Our 7-year-old fared better than we expected in her attention span, given the tour duration and amount of information. Hats off to you for your efforts !! If I had to provide any small areas for improvement, it might be interesting to incorporate 1) the current Head of the U.S. Dept. of Interior (who is Native American) and her efforts to address environmental and other types of justice across sovereign nations (given the information at the tour's start), and 2) a look ahead, and how rising sea levels may exacerbate some of the engineering issues discussed.