Alcatraz Federal Penitentiary
A 9-by-5-foot cell surrounded by cold bay currents — the federal government once staked its reputation on the claim that no one could leave.
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The scale is smaller than imagination allows: cells measuring 9 ft by 5 ft, furnished with a bed, desk, washbasin, and a toilet. Prison corridors were named Broadway and Michigan Avenue. D-Block's six isolation cells, called "The Hole," held the worst-behaved inmates under brutal conditions. After the prison closed in 1963, Native Americans occupied the island for nearly two years — a second history most visitors skip.
What to look for
- The cell dimensions in D-Block — 9 ft × 5 ft × 7 ft high, with only a bed, desk, washbasin, and wall toilet
- The corridor signs naming prison hallways after Broadway and Michigan Avenue
- The six isolation cells at the end of D-Block known as "The Hole"
Alcatraz sits 1.25 miles off the San Francisco coast and is accessible only by ferry.
Alcatraz Federal Penitentiary is one of 31 sights worth the detour in San Francisco, all bundled offline in Voyage GO — download the San Francisco pack and it sits on your map with no signal, filling your travel passport the moment you walk past.
More to see in San Francisco
- Golden Gate BridgeOpened May 27, 1937 as simultaneously the world's longest and tallest suspension bridge — you can walk the 4,200-foot main span yourself.
- Alcatraz IslandFor 29 years, cold Bay tidal currents did what bars alone could not — make escape nearly impossible.
- Transamerica PyramidAn 853-foot pyramid that ruled San Francisco's skyline for 45 years — still on the Transamerica logo even though the company quietly moved its HQ to Baltimore.
- Golden Gate ParkSan Francisco turned three miles of bare shifting sand dunes into the country's third-busiest urban park — starting from scratch in 1870.
- San Francisco Museum of Modern Art (SFMOMA)The West Coast's first museum devoted solely to 20th-century art, now stretched across 170,000 square feet after a 2016 expansion that nearly sextupled public space.
- Lombard StreetEight hairpin turns cut into a 27% hillside — the 1922 engineering fix for a grade too steep to drive straight.