Ohio Revised Code Title XV. Conservation of Natural Resources § 1517.21

(A) “Cave” means a naturally occurring void, cavity, recess, or system of interconnecting passages beneath the surface of the earth or within a cliff or ledge, including, without limitation, a grotto, rock shelter, sinkhole, cavern, pit, natural well, pothole, or subsurface water and drainage system.

(B) “Cave life” means any organism that naturally occurs in, uses, visits, or inhabits any cave, except those animals that are permitted to be taken under Chapter 1533. of the Revised Code.

(C) “Material” includes:

(D) “Owner” means any person having title to land in which a cave is located.

(E) “Speleothem” means any stalactite, stalagmite, or other natural mineral formation or deposit occurring in a cave.

(F) “Speleogen” means the surrounding material or bedrock in which a cave is formed, including walls, floors, ceilings, and similar related structural and geological components.

(G) “Sinkhole” means a closed topographic depression or basin generally draining underground, including, without limitation, a blind valley, swallowhole, or sink.

(H) “Hazard” means a risk of serious physical harm to persons or property.