Occasionally, private tours arranged by appointment give way to tours open to the general public. Whenever these are scheduled, details will appear on this page.
When a special tour takes place you can check in to this page for details. It will also be listed in the news on the Washington D.C. Sightseeing website.
Alternatively, you can send an email to email@example.com with the subject Register Me for the Occasional Tours Mailing List to register to be notified when a special tour will be taking place.