Union Cemetery isn't hard to find, despite it being way out in northwest Omaha but not much is visible from the road. It's a private burial ground and isn't open to visitors.
As you'll see in the two bottom photos, this marker is hidden by all the trees and leaves that surround the gates. It shows just how inventive you can get with a telephoto lens and fortitude, framing the cemetery name through a break in the trees.
"1 acre Lewis Thomas Homestead
Donated 1866, Land-Mark of
May They Rest in Peace"
See if you can spot the marker in the picture below, which is a view of the gates from the road.
Since there is so much foliage in the way, it's tough to see. I've circled it in this picture.