- The New Dungeness Light Station, built in 1857 is the second oldest lighthouse in Washington state. It marks the end of Dungeness Spit, the longest natural sand spit in the world, extending approximately six miles northeast from the mainland into the Strait of Juan de Fuca. From the sea, this low-lying sandy shoal is barely visible, making it an extreme hazard to shipping. Even with a beacon and fog signal, numerous vessels have run aground there. Located in Clallam County, the New Dungeness Lighthouse continues to be an important aid to navigation in the Strait of Juan de Fuca.