Nobody walks in L.A., but as a Caltech grad student in the mid 1980s without a car, I once walked from my dorm room up Mount Wilson and touched the enclosure of the famous 100-inch Hooker telescope where Hubble & Humason had documented the expansion of the universe.
Years later, I revisited Mount Wilson by car, but its observatories were secured by fencing, and I marveled at the opportunity I once had to get so close to the Hooker telescope.
Today, as I write this, firefighters battle California wild fires that have killed at least a eleven people, destroyed thousands of homes, and threatened the observatories.
My memorable mid 1980s trek (blue curve) from my dorm room at Caltech to the Mount Wilson Hooker telescope is currently evacuated or on fire (yellow and red shading).