Alcatraz Island, home to its namesake famous prison off the San Francisco Bay, welcomed back its last inmates for the 50th anniversary of the closure of one of the most notorious penitentiaries in the world.

Looking for ways to volunteer in San Francisco to help keep the city green?

Abandoned after the prison closed in the early 1960s, the Gardens of Alcatraz are a study in survival.

Taking over four rooms of Alcatraz - the former military prison, site of Native American protests and now one of America's most famous national parks - Weiwei's seven site-specific installations aim to prompt visitors to consider the experience of police force, as well as the art as an act of conscience.

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

Alcatraz Island is famous mainly for one thing: its prison. But it’s also a good place to lay eggs.

At a time when many national parks are eliminating programs and delaying maintenance, our own Golden Gate National Recreation Area is flourishing. Part of the reason is a non-profit group now celebrating its 25th anniversary. A look at one of the Park Service's most successful partnerships.

ABC 7, covering Bay Area service projects on Martin Luther King Jr. Day, reports from beautiful Crissy Field, where 70 community members helped grow their national park by weeding invasive species. The project was one of many volunteer opportunities throughout the Golden Gate National Parks on Obama's special Day of Service.

ABC 7 reports from Muir Woods National Monument on the Centennial festivities. The segment captures the sights and sounds of a memorable celebration honoring William Kent's gift and the timeless redwood giants.