The Grey Estate Cypress Slough is essentially the other side of the Twin Swamp Cypress Slough, and is accessible via a parking area directly across the road from Big Cypress Slough.
Grey Estate has several trails that follow the slough or take the hiker through interesting flat woods.
The land is also open to hunting with the proper permit.
The Grey Estate
13600 Bonebank Rd
Mount Vernon, Indiana 47620
Nature Conservancy Guidelines for Visiting Preserves