Admission : 40$ Buy Tickets Here : Alcatraz Island Duration : 4-6 hours   Previously when I use to think of San Francisco, the few things which hit my head are, Golden Gate Bridge, Lombard street and Painted ladies. Most of us don’t know the hidden(not so hidden)gems of SFO until we plan a visit. One of them is Alcatraz Island. At first i wasn’t much interested about the place as i never listened about it being famous(Most common thing everyone does) and placed it at the bottom of my to do list . While i was planning my trip , I was pre-booking everything which had ticket to it and shockingly saw…