A gigantic map of all the cool plaques in the world. A project of 99% Invisible.

Charles Taze Russell

Charles Taze Russell (1852-1916) Pastor Russell formed a Bible study group in Allegheny city in the 1870s; developed into the Watch Tower Bible & Tract Society. It became the legal corporation for...

Charles Taze Russell (1852-1916) Pastor Russell formed a Bible study group in Allegheny city in the 1870s; developed into the Watch Tower Bible & Tract Society. It became the legal corporation...

  • allegheny city
  • 19th century
  • jehovah's witnesses

Battery Mendell-- Keeping the enemy at bay

Golden Gate National Recreation Area Battery Mendell Keeping the enemy at bay Battery Mendell's mission was to keep enemy warships farther from San Francisco's harbor than any of the earlier...

Golden Gate National Recreation Area Battery Mendell Keeping the enemy at bay Battery Mendell's mission was to keep enemy warships farther from San Francisco's harbor than any of the...

  • marin headlands
  • battery
  • disappearing gun

Blue Star Memorial Highway

National Council of State Garden Clubs Blue Star Memorial Highway A tribute to the Armed Forces that have defended the United State of America Sponsored by Desert Empire District, California...

National Council of State Garden Clubs Blue Star Memorial Highway A tribute to the Armed Forces that have defended the United State of America Sponsored by Desert Empire District,...

    Bonneville Salt Flats

    Welcome to the Bonneville Salt Flats and Utah's famed measured mile--stie of world land-speed record runs. Utah's famed measured mile is located approximately seven miles beyond this marker, well...

    Welcome to the Bonneville Salt Flats and Utah's famed measured mile--stie of world land-speed record runs. Utah's famed measured mile is located approximately seven miles beyond this marker,...

    • salt flat
    • raceway
    • speed record

    Bradley J. Honholt

    In Loving Memory of Bradley J. Honholt 1932–2008 Chief Civil Engineer Roaring Camp & Big Trees Narrow Gauge Railroad Submitted by: Eric Goodill

    In Loving Memory of Bradley J. Honholt 1932–2008 Chief Civil Engineer Roaring Camp & Big Trees Narrow Gauge Railroad Submitted by: Eric Goodill

    • roaring camp

    History of the Cal Poly Research Pier

    Cal Poly Center for Coastal Marine Sciences PIER INTO THE PAST Cal Poly’s pier has undergone change throughout its history, shifting purpose from industrial use to a center for marine research &...

    Cal Poly Center for Coastal Marine Sciences PIER INTO THE PAST Cal Poly’s pier has undergone change throughout its history, shifting purpose from industrial use to a center for marine research...

      Summits of the Bay Area

        A Sacred Site

          Mount Umunhum

            Conservation Lands

              Helping Hand Hall

                Hacienda Hotel (Red Sign)

                  Hacienda Hotel

                    Site of First Minig Operation in California; Site of Reduction Works

                      Site of First Mining in California

                        Patrick Tillman

                          The Bell Tower

                            How Does Mercury Get Here?

                              What Methods are Used to Control Mining Waste Discharge in the Watershed?

                                Carson House