The twin lights of Navesink (or Highlands Lighthouse) is a very unique "castle" like stone structure, located high up on a hill. The present day light is actually the second set of lights built on the site. The first lights were built in 1828, and later featured the very first Fresnel lens installed in the US in 1841. The original towers gradually deteriorated, and were eventually replaced in 1862 with today's stone structure.
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The new north tower was built as an octagon, and the south tower a square. The keeper's quarters connected the two towers, and 1st order Fresnel lenses were installed in each light. The south tower became the first primary seacoast light to be converted to electricity. This tower was eventually deactivated, and the north tower automated in 1949. The station is a museum today, and the north tower is open for public climbing.
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