Alcatraz Island, a former prison, is a popular tourist destination accessible by ferry from San Francisco. Booking tickets well in advance is essential, especially during peak season. The island offers both self-guided audio tours and ranger-led programs. Note that some areas have limited accessibility due to the island's terrain and historic structures. Expect to spend approximately 2-3 hours exploring the island, and costs typically range from $40-$50 per person, including the ferry. Solo visits are common and rewarding, while guided tours can provide deeper historical context. Be aware that ferry schedules may be affected by weather, especially during the winter months.