It is a light house that fell into the ocean
The Cape Henlopen Lighthouse fell into the ocean in the early 1900s. As the beach eroded and moved the foundational sand disappeared. The locals used the blocks for other building projects, and sold off th bits as souvenirs. All that's left of the Cape Henlopen Lighthouse is some material preserved at the Zwaanendael Museum in Lewes, DE.
Cape Henlopen State Park was created in 1964.
Cape Henlopen High School was created in 1971.
Cape Henlopen
The Delaware Bay.
The Cape Henlopen Light House
In the sea(of course), but also in the Atlantic ocean more detailed they can be found in cape henlopen
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Cape Liptrap Lighthouse was created in 1913.
Cape Schanck Lighthouse was created in 1859.
Cape Engaño Lighthouse was created in 1888.