This is a great way to learn about the history of Houston and to get some exercise. We will enter buildings from the 1920s, 1930s, 1940s, 1970s, 1980s, and 2020s. We will walk over 5,000 steps. This is a moderate walk on level ground in air-conditioned and heated tunnels. These are the most clean and pristine public tunnels in all of the US. We will be stopping about every 5 minutes to look at and go into 7 to 11 buildings. These are safe and well-illuminated. In the summer of 2023, Accuweather and the local Channel 13/ABC affiliate interviewed me about these tunnel tours for activities to do on hot and humid days when you do not want to be outside.