Enjoy picturesque lighthouse wallpapers that will make you feel like you're at the seaside every day! The classic lighthouse is a tall circular building with a bright beacon of light shining from the top of the building, pointing out to sea. Lighthouses were built on coasts and near harbors as a way of helping sailors safely navigate the waters near land in the dark of night. In the daytime, sailors could see land approaching and knew to take care not to crash into rocks or reefs as they got c