Tillamook Rock Light (known locally as Terrible Tilly or just Tilly) is a deactivated lighthouse on the Oregon Coast of the USA. It is located approx 1.2 miles (1.9 km) offshore from Tillamook Head, and 20 miles (32 km) south of the Columbia River, situated on less than an acre of basalt rock in the Pacific Ocean. The construction of the lighthouse was commissioned in 1878, construction took more than 500 days to finish and at the time, it was the most expensive West Coast lighthouse ever built.
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