Palomar Observatory tour

Pay $5 per person to take a public guided tour (1:30pm) of the Palomar Observatory, ran by Cal Tech. Those with mobility disability cannot be accommodated at the Hale Telescope. Wear warm clothing, and comfortable shoes, as the telescope is at 5,598 feet above sea level and kept between 0 to 10 degrees Celsius.

https://en.wikipedia.org/wiki/Wikipedia:Meetup/San_Diego/May_2019