Angel Island State Park

One of the great things about San Francisco is its treasure-filled bay. Angel Island, only a short ferry ride from San Francisco, Tiburon or Vallejo, is perfect for either a short or long excursion. Bring a picnic lunch and idle the time away amid cool breezes and great views. If you feel ambitious, Mount Livermore, the island's 781-foot anchor, provides plenty of opportunities for hiking, beginning with a five-mile perimeter trail. From April to October, enjoy the Cove Cafe, and rent a bike to get around more easily. Camping is available, too, but the sites fill up quickly, so book early.