Portsmouth Harbor Lighthouse

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Portsmouth Harbor Lighthouse, located next to Fort Constitution in New Castle, New Hampshire, is open for guided tours every Sunday from 1 p.m. to 5 p.m., late May through mid-October. For a small suggested donation, visitors can climb to the top and see the Fresnel lens as well as a breathtaking view of Portsmouth Harbor. Visit our website for more information on open houses and special events.Portsmouth Harbor Lighthouse, located next to Fort Constitution in New Castle, New Hampshire, is open for guided tours every Sunday from 1 p.m. to 5 p.m., late May through mid-October. For a small suggested donation, visitors can climb to the top and see the Fresnel lens as well as a breathtaking view of Portsmouth Harbor. Visit our website for more information on open houses and special events.