What is the name of this island?
It is called Alcatraz Island and it is located in the middle of the San Francisco Bay.
It was once a prison.
What is the name of this place?
It is the Palace of Fine Arts.
It was built for the 1915 World's Fair.
Is this a museum?
No, it isn't. It is called the Ferry Building.
Visitors catch ferries here that take them across the San Francisco Bay.
There is a clock tower on top of the building.