The 9/11 Museum
The museum displays over 10,000 monumental artifacts linked to the events of 9/11 and is made up of three permanent exhibition sections:

• The Historical Exhibition has three parts: the Day of 9/11, Before 9/11 and After 9/11. It tells the story of what happened on 9/11, including the events at the World Trade Center and the Pentagon and the story of Flight 93. 
• The Memorial Exhibition "In Memoriam", commemorates the lives of those who perished on September 11, 2001 and February 26, 1993 and provides visitors with the opportunity to learn about the men, women and children who died.
• The Foundation Hall is a room of massive scale, which houses both the last column and the slurry wall. 

The 9/11 Memorial (Free Entry)
The “National September 11 Memorial” is a tribute of remembrance and honor to the nearly 3,000 people killed in the terror attacks of September 11, 2001 at the World Trade Center site, the Pentagon, as well as the six people killed in the World Trade Center bombing in February 1993. 

The memorial’s twin reflecting pools are each nearly an acre in size and feature the largest manmade waterfalls in North America. The pools sit within the footprints where the Twin Towers once stood. The names of every person who died in the 2001 and 1993 attacks are inscribed into bronze panels edging the memorial pools.