 The remainder of the site is Greenscape consisting of Sodded open area with some 50,000 Kewensis, Sedum and Vinca Minor plants along with thirty-four caliper Japanese Pagota and Honey Locust trees.The expansion of Bartle Hall was a significant technical challenge.Construction of the additional convention space was built over a continuously open six-lane freeway, Interstate 670, which runs underneath the convention center.