What is a landmark starting with the letter s?

Answer 1

St. Peter's (the Vatican); Sydney Opera House (Sydney, Australia); St. Mark's Cathedral (Venice); St. Patrick's Cathedral (New York City); Sistine Chapel (Vatican); Sears Tower (Chicago); San Quentin State Prison (California); Sing Sing Correctional Facility (New York); Sky Tower (Auckland, New Zealand); The Smithsonian Museums (New York City); Shwedagon Pagoda (Buddhist pagoda in Yangon, Myanmar); Stonehenge (Wiltshire, England)