Natural Bridge

Natural Bridge 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 (66 m) high with a span of 90 ft (27 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.
Thomas Jefferson purchased 157 acres (635,000 m²) of land including the Natural Bridge from King George III of England for 20 shillings in 1774. He called it "the most Sublime of nature's works". Jefferson built a two-room log cabin, with one room reserved for guests, beginning its use as a retreat. While President, in 1802, he surveyed the place with his own hands. It has been said that Jefferson was able to throw a stone from the ground below the bridge to the top.
Natural Bridge has been designated a Virginia Historic Landmark and a National Historic Landmark.
I just can say - amazing. Beautiful walk and Earth-cache in one ;)

Natural Bridge, Virginia, USA