The cache is not at the posted coordinates! You will first have to find
What's That Tree? (I) - Ladd Arboretum Northeast" (GC2E0JF)
and
What's That Tree? (II) - Ladd Arboretum Southwest" (GC2E0KN)
There's a hint in each of the final containers (under the lid and on the log sheet) that lead you to the location of this cache!
After a walk of more than a mile you deserve a bonus!
The cache container is a regular sized spray-painted lock'n'lock container. It contains a TREE for the FTF!
Here's some background information on the arboretum and the ecology center that I found on laddarboretum.org:
The Edward R. Ladd Arboretum stretches along a three-quarter mile segment of McCormick Boulevard on a narrow, 23 acre strip of reclaimed land. It follows the diagonal course of the North Shore Channel from Green Bay Road to the northeast, to Emerson and Golf Road in the southwest.
The North Shore Channel was created as a "drainage channel". It was designed to divert wastes from entering the lake and extends from Wilmette Harbor, through Evanston and Chicago, and empties into the Chicago River at West River Park just south of Foster. As a result the entire right-of-way of the channel is owned by the Metropolitan Sanitary District of greater Chicago, with the peripheral land, including the Ladd Arboretum, leased to local communities. Evanstonians decided to use the land and the artificial waterway as areas of natural beauty and recreation for all.
In 1959, the first tree, a ginkgo, was planted by the Evanston Review in the memory of Edward Rixon Ladd (1883-1956). E.R. Ladd was a founder, publisher, and editor of the Evanston Review. On June 10, 1960, after many other trees were planted, the Arboretum was formally dedicated as an enduring place of peace, beauty, and educational value.
Today the Ladd Arboretum remains a magnificent place to visit year-round.
The Evanston Ecology Center was built in 1974 and serves as the educational nucleus of the Ladd Arboretum. It strives to foster a greater appreciation, awareness and knowledge of the natural environment and our interdependence with it. Today it houses an office, classroom/lecture room, a nature/gift store, a small resource library, and curriculum resource materials.
Programs, classes, and services of the Ecology Center range from introductory natural history classes covering areas such as plant identification and animal study to sensory awareness programs for children and beginning naturalists. The center's staff lead canoe trips in Spring and Fall highlighting the natural history aspects of the North Shore Channel.
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This cache / cache series was mentioned in the Chicago Geocacher Podcast - a great show that I highly recommend! Very funny!!