Symbols on the surface
After the collapse of the two buildings, the recovery and cleanup operations began, which were massively complicated by the fire that lasted 100 days. In honor of those helping at the time and the bereaved who became sick, injured, or died during the recovery work, the Memorial Glade, a passage with layered stones, was erected.
A tree that was discovered under the rubble, which now has its place in the Memorial Park as the Survivor Tree.
Finally, standing on a raised level is the former centerpiece of the World Trade Center Plaza, The Sphere, a massive bronze sculpture that towers over the site. This artwork, also known as The Great Spherical Caryatid N.Y., by the German sculptor Fritz Koenig, stood from 1971 until the terrorist attacks on September 11, 2001, between the Twin Towers in front of the World Trade Center in New York City. The artifact, weighing more than 20 tons, was recovered from the rubble of the collapsed Twin Towers as the only art piece that was damaged but largely intact.