We purchased tickets to the Muir Woods/Sausalito/Alcatraz tour on 7/14/19. It said to be at the bus by 800am to leave. We showed up and were told our reservation didn’t go through. Viator had issues, and “someone should have contacted me”. Wasted trip to catch the bus, not to mention our disappointment. Gray lines allowed us on the 1:45 tour, but we had to reschedule our whole day.