6. Swamp white oak trees create a rustling canopy of leaves over the plaza. This grove of trees bring green rebirth in the spring, provide cooling shade in the summer and show seasonal color in fall. A small clearing in the grove, known as the Memorial Glade, designates a space for gatherings and special ceremonies.
7. Relatives of 9/11 victims are exempt from all fees and charges. Discounts are offered to students, seniors and other groups, and the museum offers free general admission between 5 and 8 p.m. each Tuesday.
Photos courtesy: 9/11 Memorial Museum
(*The World Trade Center itself suffered more than $500 million in damage on February 26, 1993. Terrorists parked a rental van in a garage underneath the World Trade Center’s twin towers and lit the fuses on a massive homemade bomb stuffed inside. Six people died and more than 1,000 were injured in the subsequent explosion, which carved out a crater several stories deep and propelled smoke into the upper reaches of the quarter-mile-high skyscrapers.)