One of the iconic landmarks of the San Francisco area is the Golden Gate Bridge. This suspension bridge spans the Golden Gate Strait, where the San Francisco Bay meets the Pacific Ocean. The American Society of Civil Engineers calls this one of the Wonders of the Modern World. The prison on Alcatraz Island is quite possibly one of the most famous and notorious prisons in the world. Built-in 1934, this historic landmark now has the national park service in charge of the grounds. It's just a short ferry ride from Downtown San Francisco and it’s a must-see when visiting the area. With over two million visitors per year, the famous Lombard Street is certainly a sight to behold. It is often referred to as the "most crooked street in the world" because of the eight hairpin turns that occur in one city block. If you’d like to spend some time getting back to nature on your trip to San Francisco, a stop at the beautiful Muir Woods National Monument should be on your list.