英文關鍵字
alcatraz
america
american
attraction
bay
boat
building
california
city
cloudy
concept
destination
detention
escape
famous
federal
ferry
fortification
francisco
freedom
historic
island
jail
landmark
landscape
lighthouse
park
penitentiary
prison
rock
san
sea
site
sky
states
summer
symbol
tourism
tourist
travel
united
usa
view
water