A secret jewel of the Bay Area, Point Bonita is still an active lighthouse maintained by the U.S. Coast Guard. Discover Point Bonita's wild landscape, geology, and fascinating history.

The lighthouse is reached by a half-mile trail, with a tunnel that is open only on Saturdays, Sundays, and Mondays, from 12:30 - 3:30 p.m. Point Bonita docents are on hand along the trail, and the setting offers breathtaking views.

During the tense years from 1953 to 1979, the United States Army built and operated a total of 280 Nike missile firing batteries in the United States, emplaced as the last line of defense against Soviet bombers. Today, site SF-88 in the Marin Headlands has been turned into a museum, and is the only restored Nike missile site in the country.

Visit SF-88 and see the tools of the Cold War up close. The site is open Wednesday through Friday, 12:30 - 3:30 p.m., with guided walks beginning every hour. There is also an "open house" on the first Saturday of every month, 12:30 - 3:30 p.m., with volunteer docents and Nike veterans on hand.

The only children's museum in the U.S. to be located in a national park, the Bay Area Discovery Museum is a one-of-a-kind indoor and outdoor children's museum nestled at the foot of the Golden Gate Bridge.

The first Wednesday of the month, admission is free to the museum. Bring the family down to explore the 7.5-acre, indoor-outdoor environment that harmonizes nature and nurture.

Check out permanent exhibits such as Lookout Cove, which includes a shipwreck with clues to dig up and discover, and the San Francisco Bay Hall, a playful simulation of the Bay Area with an "underwater" tunnel, 300-gallon sea star tank, a fishing boat, a model of Fisherman's Wharf, and a play shipping port.

Long closed to public access, Battery Townsley in the Marin Headlands has been refurbished and is now open to visitors the first Sunday of the month.

Come explore this labyrinthine fortification, and learn about San Francisco's most extensive -- and most secret -- World War II military fortification.

From 1940 to 1948, it mounted two massive battleship guns and housed more than 100 soldiers in an extensive network of underground tunnels; during the Cold War, it was used as an underground research facility.

Battery Townsley is reached via a moderately strenuous hike up the Coastal Trail, approximately one half-mile north of the Rodeo Beach parking lot.

Join docent Warren Riley for an illustrated talk about the history of the lighthouses of San Francisco Bay and their critical role in the growth of California.

Reservations can be made by calling (415) 331-1540.

Artists, art patrons, art lovers, and everyone else is welcome on 4th Street in San Rafael every second Friday of the month for the city’s art walk.

Browse open studios and art galleries, and enjoy the latest and greatest work by some of the Bay Area’s most talented artists -- along with a glass of wine or two. Galleries and retailers will have special extended hours so that art walkers can experience the full variety of downtown commerce, from art and artisan gifts to clothing and accessories.

Every second Wednesday of the month, from May through October, the Caledonia Street neighborhood in beautiful Sausalito welcomes residents and visitors to the Sausalito Art Walk.

Businesses, galleries, and restaurants on and around Caledonia Street host Bay Area artists and are open to the public for viewing.

Each week you might see oil painting, photography, jewelry, sculpture, pottery, or watercolors, all crafted by local artists.

In addition, you'll find many musicians and entertainers performing on the street, as well as a children's stage to keep the little ones engaged.

Check out the bounty of produce grown in Northern California at one of the state's largest farmers markets, held each Sunday, all year round, in the Marin Civic Center parking lot. There's no better way to shop local!

During peak summer season, you'll find more than 200 local farmers, artisans, and food vendors selling everything from oranges to tamales, fresh cheese to creative jams to locally made pottery.

Come for lunch, shop for dinner, or for graze the booths for a mid-morning snack of free samples!

The Sausalito Farmers Market offers an abundance of locally grown and/or produced vegetables, fruits, organic products, gourmet cheese, herbs, seafood, meats, organic coffee, desserts, and wines, available right from the people who produce them.

This is the perfect spot to sample Marin County's agricultural bounty, grab fixings for a picnic, or stock up on groceries for your hostel stay.

The Farmers Market is held year-round at Dunphy Park.