The main entrance to the Bowl occurs at its northwestern edge. The Entry Portal is approached through a clearing of trees on a black slate plaza marking the Flight Path. High textured concrete walls frame the sky where Flight 93 descended to the crash site. The walkway leads visitors through the first wall into a plaza featuring Red Maple trees and through a second portal to give visitors their first look at the expanse of the Bowl and the crash site below.  From the plaza, visitors can enter the visitor center or continue on to the tree-lined walkway that curves around the edge of the Bowl. A ring road will also follow the walkway for those unable to walk the path.