I have visited 100 or so of the 1,052 World Heritage sites, including 16 of the 23 sites in the United States. I know this because I counted them Saturday while searching online for an urban site recognized by UNESCO that is enclosed in modern glass walls.
I learned two things Saturday. One, I am not as well traveled as I thought, and I have a lot of World Heritage travel to plan in the coming years if I am going to visit a greater number of the remarkable sites in my lifetime. Two, I could not find a single site enclosed by glass walls.
Are there any World Heritage sites enclosed in glass walls?
I put the question to Councilman Roberto Treviño (D1) and Trish DeBerry, who is handling media for the Alamo Management Committee and Preservation Design Partnership (PDP) of Philadelphia, in an email last week.