The parking lot at the CfA requires a parking permit. Temporary permits, subject to availability, may be purchased at the HCO Administrative Office, room B-115 at the CfA complex at 60 Garden Street (cash only payments). You can also purchase a temporary permit online.
Steps to Purchasing Online One-day Permits:
Visit the web page https://www2.uos.harvard.edu/cgi-bin/permit/purchase.pl.
At the bottom of the page click "Visitor."
As a visitor you must register (unless you have used the system before). To register for the first time, click on "Click here to Register." Fill out log-in information and your personal profile. Otherwise enter your username and password.
At the bottom of the page click "Visitor," select "Observatory" as your department and enter the code 2018.
Follow the directions on the sreen.