At the back of the garden is the park district’s 8th largest tree, a 600-year-old twin sycamore named “Marie’s Sycamore,” which was alive when Christopher Columbus discovered America in 1492. It has a circumference of 197 inches and stands 31 feet tall. (Total Points: 315). Near this Sycamore stands “Big Blue,” a Blue Ash tree that stands 127 feet tall.

This tree was one of John and Marie Aull's favorite trees on the property, and both had their ashes scattered beneath it upon their deaths. It is surrounded by Virginia bluebell blooms in spring and Lycoris blooms (magic lilies) in late summer. The path to it is lined with spring wildflowers and a grove of American Bladdernut trees (Staphylea trifolia).

This area is accentuated by the sound of Wiles Creek, a signature throughout Aullwood Garden, contributing to the tranquility offered by this woodland estate. The stream originates north of the property and features several small water falls that murmur in the background. (wading and swimming are not permitted).