The 9/11 Memorial Museum, located where the Twin Towers once stood, explores the history of the 9/11 terrorist attacks. The museum houses artifacts, historical records, firefighting equipment and a memorial exhibition.
While it's closed to visitors on September 11, it's open during the rest of the week. Adult general admission costs $33. Every Wednesday afternoon at 1:30pm, a bagpipe tribute honors those who died on 9/11 as well as those who are sick or who have died from exposure to hazards and toxins in the aftermath of 9/11. Bagpipers play near the 9/11 Memorial Glade.