Twelve concrete observation towers along the coast were constructed during World War II to protect Delaware's coastal towns from German u-boat attacks.
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New Sweden was founded as a colony in 1638 and is recognized as the first permanent colony on Delaware soil.
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Odessa, Delaware possesses one of the finest collections of late 18th- and early 19th-century architecture in the middle Atlantic region. The center of town is on the National Register of Historic Places and the entire town has been zoned as historic.
