"1997-11-18Z"^^ . "Natural Bridge in Rockbridge County, Virginia, is a geological formation in which Cedar Creek (a small tributary of the James River) has carved out a gorge in the mountainous limestone terrain, forming a natural arch 215 ft (65.532 m) high with a span of 90 ft (27.432 m). It consists of horizontal limestone strata, and is the remains of the roof of a cave or tunnel through which the creek once flowed."@en . . "97001401" . "Natural Bridge"@en . . .