The Fresnel lens inside the Point Reyes Lighthouse—whose glass prisms bend and refract light to create a powerful beam—will be restored during the landmark's first-ever major renovation, which started this week.   Teresa Mathew

The National Park Service on Monday began a $5 million restoration of the Point Reyes Lighthouse, the first extensive refurbishment in the landmark’s 148-year history. Work is expected to be completed next spring, but with access to the visitor center and observation deck opening again in  early October. 

Accessibility, said park spokesman John . . .