Southeast Lighthouse is a historic lighthouse located at the Mohegan Bluffs along Block Island's southeastern tip. The lighthouse was originally commissioned in 1856 and constructed in 1874, lit for the first time the following February. Though it was decommissioned for use by the United States Coast Guard in 1990, it was relocated by 300 feet due to bluff erosion concerns and transferred to the care of the Southeast Lighthouse Foundation preservation organization. Since 1997, it has been designated as a United States National Historic Landmark, noted as one of the only remaining American lighthouses to use a first-order Fresnel lens. The lighthouse is open for guided tours during the summer months, with a small museum and gift shop open to the public at the tower's base.

122 Mohegan Trail, New Shoreham, Rhode Island, 02807

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