Cape Lookout National Seashore, North Carolina.
The light is the second to be built on the cape. The first in 1812 and the present in 1859. The diamond pattern is a distinctive aid during daylight and a "fresnel" lens shines at night. The light warns mariners of the treacherous lookout shoals [called Promontorium Tremendum or "Horrible Headland" on old maps] that extend for 10 miles into the blue Atlantic.
Hundreds of ships have been lost here and in WWII the inlet provided one of the few safe havens from German U-Boats patrolling the shores.