Pershing Square: Presidio Cannons (U.S. National Park Service)

Pershing Square: Presidio Cannons (U.S. National Park Service)

Pershing Square (U.S. National Park Service)

Historical Landmark Cannons Around San Francisico Bay

Presidio of San Francisco - FortWiki Historic U.S. and Canadian Forts

Presidio of San Francisco - FortWiki Historic U.S. and Canadian Forts

Pershing Square: Presidio Cannons (U.S. National Park Service)

Presidio of San Francisco - Wikipedia

Pershing Square, Presidio Picnic Sites

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Pershing Square (U.S. National Park Service)

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The Presidio

Hotel History in San Francisco, California - Inn at the Presidio