Flower by the North Memorial Pool

NEW YORK--On September 11, 2011, the 9/11 Memorial opened here, and already more than 2 million people have visited. There, guests take in somber remembrances of the 2,983 people who died in the terrorist attacks of September 11, 2001, and the 1993 World Trade Center bombing.

The memorial is in the most somber place possible: in and around the former location of the World Trade Center towers that came crumbling down. The most striking elements are the two memorial pools, located in the actual footprints of the original North and South World Trade Center towers.

As visitors walk around the site, they can use two mobile apps to help orient themselves, find the names of specific 9/11 victims, hear stories about victims, and much more.

In this picture, a flower has been placed alongside the North Memorial Pool.