A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid for maritime pilots at …

In observance of Martin Luther King Jr. Day, all Lighthouse branches and offices will be closed on Monday, January 19, 2026.

Lighthouse has audits for performance, accessibility, progressive web apps, SEO, and more. You can run Lighthouse against any web page, public or requiring authentication. You can run …

Lighthouse, structure, usually with a tower, built onshore or on the seabed to serve as an aid to maritime coastal navigation, warning mariners of hazards, establishing their position, and …

7 hours ago · View 20 Beautiful Lighthouses That Lead the Way to Serene Scenes These highlights from the Smithsonian Magazine Photo Contest include cliffside towers and lovely ...

Dec 24, 2025 · This site includes photographs, directions, histories, and GPS coordinates garnered while personally visiting every lighthouse in the United States and nearly every …

A lighthouse is a tower with a bright light on the top. It helps warn sea travelers of dangerous areas and serves as a navigational aid that helps to keep vessels of all sizes safe.

The Lighthouse of Alexandria, sometimes called the Pharos of Alexandria, [a] was a lighthouse built by the Ptolemaic Kingdom of Ancient Egypt, during the reign of Ptolemy II Philadelphus …

Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps. When auditing a page, Lighthouse runs a barrage of tests …

Lighthouses are built from wood, stone, brick, reinforced concrete, iron, steel, or aluminum. They are designed to withstand local environmental conditions. For example, tall skeletal …