Lake Katharine State Nature Preserve was created in 1975.
The area of Lake Katharine State Nature Preserve is 8,170,603.1168256 square meters.
Brigadoon State Nature Preserve was created in 1985.
Beargrass Creek State Nature Preserve was created in 1982.
Acadia Cliffs State Nature Preserve was created in 1994.
Hoosier Prairie State Nature Preserve was created in 1976.
Conkle's Hollow State Nature Preserve was created in 1925.
Blackhand Gorge State Nature Preserve was created in 1975.
Bad Branch Falls State Nature Preserve was created in 1985.
Axe Lake Swamp State Nature Preserve was created in 1991.
Six Mile Island State Nature Preserve was created on 1979-06-24.
The area of Acadia Cliffs State Nature Preserve is 453,247.9193088 square meters.
The area of Blackhand Gorge State Nature Preserve is 3,872,841.5962368003 square meters.