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

Home of Martin Luther King, Jr.

This house, built in 1884, was the home of Martin Luther King, Jr. in 1952-53 while he was enrolled in the Graduate School of Boston University. The building was rehabilitated in 1987 by the...

This house, built in 1884, was the home of Martin Luther King, Jr. in 1952-53 while he was enrolled in the Graduate School of Boston University. The building was rehabilitated in 1987 by the...

  • boston
  • mlk
  • boston university
  • civil rights
  • 1884
  • 1952

Parapet Promenade

PARAPET PROMENADE IN MEMORY OF ADDA AND PAUL SAFRAN BY JORDAN PYNES, LINDSAY SAFRAN AND TOM SAFRAN

PARAPET PROMENADE IN MEMORY OF ADDA AND PAUL SAFRAN BY JORDAN PYNES, LINDSAY SAFRAN AND TOM SAFRAN

    Grays River Covered Bridge

    Submitted by @Ritterton

    Submitted by @Ritterton

    • covered bridge
    • gray's river

    Goulburn Weir

    Submitted by @markfilops

    Submitted by @markfilops

    • conveys water
    • weir
    • canal
    • goulburn
    • murray

    Monocoupe D-145

    Monocoupe D-145 ca. 1941 This Monocoupe D-145 was one of the last airplanes produced by Monocoupe before the outbreak of World War II. The Monocoupe Aircraft Corporation, founded in Bettendorf,...

    Monocoupe D-145 ca. 1941 This Monocoupe D-145 was one of the last airplanes produced by Monocoupe before the outbreak of World War II. The Monocoupe Aircraft Corporation, founded in Bettendorf,...

    • louisiana
    • aviation

    Golden Gate Park Carousel

      Boundary Line

      From the Flickr group Historical Markers, photo by WashuOtaku, full page.License is Attribution-ShareAlike License

      From the Flickr group Historical Markers, photo by WashuOtaku, full page.License is Attribution- ShareAlike License

        Pere Marquette Railway Depot

        Completed in 1921 for the Pere Marquette Railway, this depot is typical of the railroad stations that served Michigan towns during the early decades of the twentieth century. The depot replaced an...

        Completed in 1921 for the Pere Marquette Railway, this depot is typical of the railroad stations that served Michigan towns during the early decades of the twentieth century. The depot replaced an...

        • michigan
        • michigan his...

        Lipson Lake

        From the Flickr group Historical Markers, photo by chrisinplymouth, full page.License is Attribution-NonCommercial-ShareAlike License

        From the Flickr group Historical Markers, photo by chrisinplymouth, full page.License is Attribution- NonCommercial-ShareAlike License

          Waldenses

          From the Flickr group Historical Markers, photo by WashuOtaku, full page.License is Attribution-NonCommercial-ShareAlike License

          From the Flickr group Historical Markers, photo by WashuOtaku, full page.License is Attribution- NonCommercial-ShareAlike License

            Ernest M. Hemingway, Class of 1917

            From the Flickr group Historical Markers, photo by Crawford Brian, full page.License is Attribution-NonCommercial-ShareAlike License

            From the Flickr group Historical Markers, photo by Crawford Brian, full page.License is Attribution- NonCommercial-ShareAlike License

              Nun of the Above

              IN MEMORY OF EVERY NUM OF THE ABOVE SISTERS OF PERPETUAL INDULGENCE

              IN MEMORY OF EVERY NUM OF THE ABOVE SISTERS OF PERPETUAL INDULGENCE

                Blue Star Memorial HIghway

                  Great White Cherry

                  • sister city
                  • osaka
                  • san francisco

                  Mill Bay Laundry

                  From the Flickr group Historical Markers, photo by chrisinplymouth, full page.License is Attribution-NonCommercial-ShareAlike License

                  From the Flickr group Historical Markers, photo by chrisinplymouth, full page.License is Attribution- NonCommercial-ShareAlike License

                    Mackinac Conference

                    On September 6, 1943, Michigan’s Republican United States senator, Arthur H. Vandenberg, chaired the meeting of the Post War Advisory Council. Republican National Committee chairman Harrison...

                    On September 6, 1943, Michigan’s Republican United States senator, Arthur H. Vandenberg, chaired the meeting of the Post War Advisory Council. Republican National Committee chairman...

                    • michigan
                    • michigan his...

                    A Tree for You and Me

                      The Cape Ray Telegraph Cable

                      From the Flickr group Historical Markers, photo by HystericalMark, full page.License is Attribution-ShareAlike License

                      From the Flickr group Historical Markers, photo by HystericalMark, full page.License is Attribution- ShareAlike License

                        World's Largest Limestone Quarry

                        Limestone is a mineral raw material essential in making steel, chemicals, and cement. Henry H. Hindshaw, a geologist, established in 1908-09 the commercial value of this area’s limestone for...

                        Limestone is a mineral raw material essential in making steel, chemicals, and cement. Henry H. Hindshaw, a geologist, established in 1908-09 the commercial value of this area’s limestone...

                        • michigan
                        • michigan his...

                        River Street