From post to prison to protest site to park, the island of Alcatraz has worn many hats.

Every autumn, the sky above the Marin Headlands just north of San Francisco becomes a raptor superhighway. Stand on Hawk Hill during the southward migration’s peak—from September 10 to October 10—and you can expect to see from dozens to hundreds of birds of prey in an hour.

Search “San Francisco” in the Getty Images stock-photo library and more than 350 pages of photos will pop up, including of beautiful shots of the Golden Gate Bridge, Alcatraz, and other SF landmarks.

Discussing the three semifinalists submitting final proposals to create a cultural venue to replace the Presidio's former commissary building, today's Sports Basement store.

NPS doesn't track the race or ethnicity of its more than 275 million annual visitors. But there is an effort to better understand who is visiting public lands.