On the edge of an Iowa DOT wetland area, you can find the nest. The name has personal significance; you probably would not really see a cuckoo bird here. Perhaps the name just describes anyone crazy enough to try geocaching.
"One flew east, one flew west, one flew over the cuckoo's nest." Ken Kesey
A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently or seasonally. Wetlands are considered among the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal species. Wetlands contribute a number of functions that benefit people. These include water purification, groundwater replenishment, flood control, and support of plants and animals.
Paraphrased from https://en.wikipedia.org/wiki/Wetland
Original wetland basins once covered 4 to 6 million acres of Iowa. Wetlands remain part of every watershed in Iowa, but 90-95% of the original wetlands were drained and are no longer fully functional.
It is now known that this loss of wetlands has contributed to poorer water quality, increased flooding, and loss of wildlife habitat, as well as a growing list of adverse economic and aesthetic impacts.
The Iowa Department of Transportation (Iowa DOT) develops and constructs wetland areas that serve as compensatory mitigation for wetlands impacted by roadway construction.
Paraphrased from https://www.epa.gov/sites/default/files/2019-03/documents/iowa_wpp_final_1_29_16.pdf