This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Bell Rock Lighthouse cross section. en Bell Rock Lightouse cross section es Seccin del faro de Bell Rock On theory and construction of lighthouses Alan Stevenson PDold Bell Rock Lighthouse Drawings of lighthouses
Page 2023 Free-images.com. All images are Public Domain