We walked from fisherman's wharf to the ferry building on a bright, sunny day and it was wonderful. Walking along the Embarcadero, passing the attractions Pier 39, Hard Rock Cafe, Exploratorium, cruise ship terminal, Alcatraz boat terminal, etc. It's a 30 minute walk to the ferry building. During the walk, you can take in the ocean air, the sun (If not foggy) and a nice view of San Francisco bay. If you glance right, you will see Coit Tower hovering on the hill. Tip: bring layers of clothing as the temperature could turn in a second and turn cool to cold...