[header] How to visit the world trade center [title] Take the official 9/11 tour to learn about the events and the memorial. [step] This is the most popular tour because it covers a broad overview of the events of the attack, the construction of the memorial, and the history of the world trade center. The tour guide will explain the symbolism of the memorial and how it relates to the past and future of the area. 
[substeps] This tour is a 45-minute walking tour of only the memorial grounds. Pre-booking your tour isn't required unless you have specific time constraints or are making a reservation for a large group.