John, our tour guide was a recent graduate. He shared his personal experiences, historical knowledge and fun facts. The campus was too large to visit every square mile. We did not enter the buildings nor go inside the dorms. Our daughter was taking a summer pre college program and we were unable to enter due to COVID - so, I bet it was for the same reasons. You need a hat and proper walking shoes. It lasted 1.5 hours, at a temperature of about 75-80 degrees. So, it was bearable and on a beautiful sunny day. I highly recommend the hat and sunglasses, as well as a bottle of water. We visited dorms where famous and renowned people lived, heard the history of John Harvard and The Harvard/Elkins Widener Library, Harvard Square, and finally the Harvard Shop that had some good prices for tourists. We enjoyed our tour and highly recommend.