With its landmark orange towers, the Golden Gate Bridge offers incredible views of the Bay and is open to cars, bikers, joggers, and walkers. http://www.goldengatebridge.org.
If you're into shopping, you'll be into Union Square. Home to upscale boutiques and the expansive Westfield San Francisco Centre, you'll find world-class restaurants, first-rate theater, and dozens of cafés. http://www.unionsquareshop.com.
This former U.S. Army post has features everything from historic buildings, a national cemetery, and a saltwater marsh to forests, beaches, and miles of hiking and biking trails. http://www.presidio.gov
Known as the "crookedest street in the world," this iconic street features eight sharp turns on a precarious 40-degree slope. http://www.sftravel.com/lomabardcrookedstreet.html.
Golden Gate Park
An oasis in the middle of San Francisco, Golden Gate Park extends all the way to the Pacific Ocean. It's comprised of ball fields, playgrounds, museums, and a rose garden. http://www.golden-gate-park.com.
Aquarium of the Bay
Discover the diverse aquatic life of the Bay in four equally stimulating sections, including Discover the Bay, Under the Bay, Touch the Bay, and Save the Bay. http://www.aquariumofthebay.org/
Angel Island State Park
Enjoy biking, hiking, camping, and kayaking at Angel Island. Tram tours are also available on this spectacular site whose history dates back as far as the Miwok Indians. http://www.angelisland.com
San Francisco Museum of Modern Art (SFMOMA)
Visitors to this first-rate contemporary museum will enjoy all types of art, from painting to sculpture to photography, along with special exhibits that change every few months.http://www.sfmoma.org.