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

Spotted Wolf Canyon

    Easternmost Point in North America

    Submitted by Helen Zaltzman

    Submitted by Helen Zaltzman

    • canada
    • north american
    • easterly

    First public school in California

    THIS MARKS THE SITE OF THE FIRST PUBLIC SCHOOL IN CALIFORNIA ERECTED IN 1847    OPENED APRIL 3, 1848 THIS COMMEMORATIVE MARKER WAS ERECTED IN 1957 BY THE GRAND LODGE OF FREE AND ACCEPTED MASON OF...

    THIS MARKS THE SITE OF THE FIRST PUBLIC SCHOOL IN CALIFORNIA ERECTED IN 1847    OPENED APRIL 3, 1848 THIS COMMEMORATIVE MARKER WAS ERECTED IN 1957 BY THE GRAND LODGE OF FREE AND ACCEPTED MASON...

    • san francisco
    • bay area
    • california
    • school
    • 1847

    Edmonton House

    Submitted by @YuEuG .

    Submitted by @YuEuG .

    • edmonton
    • walter
    • canada

    Alley Pond Giant

    The Alley Pond Giant.   Measured in the year 2000 at a height of 133.8 feet with a girth of 18.6 feet, this tulip tree may be the tallest and oldest living organism in the city. 

    The Alley Pond Giant.   Measured in the year 2000 at a height of 133.8 feet with a girth of 18.6 feet, this tulip tree may be the tallest and oldest living organism in the city. 

    • alley pond giant
    • new york
    • nyc
    • oldest living thing

    Santa Barbara -- Puerto Vallarta

    SANTA BARBARA - PUERTO VALLARTA  SISTER CITIES IN MEMORY OF MICHAEL J. LEMUS M.D. 1918 - 1991 A RECOGNITION OF CULTURAL DIVERSITY AND SHARED HUMANITY 

    SANTA BARBARA - PUERTO VALLARTA  SISTER CITIES IN MEMORY OF MICHAEL J. LEMUS M.D. 1918 - 1991 A RECOGNITION OF CULTURAL DIVERSITY AND SHARED HUMANITY 

    • santa barbara
    • california
    • puerto vallarta

    Boyle and Hooke

     In a house on this site between 1655 and 1668 lived Robert Boyle. Here he discovered Boyle's Law and made experiments with an air pump designed by his assistant Robert Hooke, inventor, scientist...

     In a house on this site between 1655 and 1668 lived Robert Boyle. Here he discovered Boyle's Law and made experiments with an air pump designed by his assistant Robert Hooke, inventor,...

      William Stewart Memorial Music Shell

      William Stewart Memorial Music Shell   This music shell is dedicated to the man who built an unparalleled instrumental music department for the Muskegon Public Schools from 1936 until his death in...

      William Stewart Memorial Music Shell   This music shell is dedicated to the man who built an unparalleled instrumental music department for the Muskegon Public Schools from 1936 until his death in...

        Millstone from the Bates Flour Mill

        MILLSTONE FROM THE BATES FLOUR MILL This Limestone Millstone Was Donated To The Dexter Area Historical Society By Erwin and JoAnn Mast SEPTEMBER 14TH 1990   THE BATES MILL SITE: THE SOUTHWEST...

        MILLSTONE FROM THE BATES FLOUR MILL This Limestone Millstone Was Donated To The Dexter Area Historical Society By Erwin and JoAnn Mast SEPTEMBER 14TH 1990   THE BATES MILL SITE: THE SOUTHWEST...

          100 Years of Camping on this Site

          100 Years of Camping on this Site 1910 – 2010 Beginning in 1910, Lawrence Hall, a Chicago orphanage for boys, operated a summer camp on this site, known as Camp Hardy.  The program ended in 1963. ...

          100 Years of Camping on this Site 1910 – 2010 Beginning in 1910, Lawrence Hall, a Chicago orphanage for boys, operated a summer camp on this site, known as Camp Hardy.  The program ended in 1963. ...

            Montgomery's Slave Traders

            MONTGOMERY'S SLAVE TRADERS Vast plantations with large populations emerged in Alabama's Black Belt beginning in 820. Montgomery's proximity to the Black Belt made the city a center for slave...

            MONTGOMERY'S SLAVE TRADERS Vast plantations with large populations emerged in Alabama's Black Belt beginning in 820. Montgomery's proximity to the Black Belt made the city a center for...

            • montgomery
            • slavery
            • slave traders
            • eji
            • mississippi
            • alabama

            Ted Librero

            In memory of  Theodore "Ted" Librero For His Dedication to Emery Cove February 1938 - October 2002

            In memory of  Theodore "Ted" Librero For His Dedication to Emery Cove February 1938 - October 2002

            • emeryville
            • california
            • bay area
            • cove
            • emery

            Emeryville Peninsula Fire Station

              Charles and Frankie Hromada Foyer

              THIS GRAND FOYER IS NAMED IN HONOR OF   CHARLES AND FRANKIE HROMADA   AFTER COMPLETING A BACHELOR'S DEGREE IN FORESTRY IN 1953 AND MASTER'S DEGREE IN ENTOMOLOGY IN 1954, CHARLIE HROMADA BECAME A...

              THIS GRAND FOYER IS NAMED IN HONOR OF   CHARLES AND FRANKIE HROMADA   AFTER COMPLETING A BACHELOR'S DEGREE IN FORESTRY IN 1953 AND MASTER'S DEGREE IN ENTOMOLOGY IN 1954, CHARLIE HROMADA BECAME A...

              • charles and ...
              • west lafayette
              • indiana
              • purdue university
              • forestry
              • entomology
              • pest management
              • terminix

              Purdue University's Gratitude to Mrs. Alice Earl Stuart

              THIS TABLET IS ENDURING EVIDENCE OF THE GRATITUDE OF PURDUE UNIVERSITY TO MRS. ALICE EARL STUART 1850 - 1937 WHOSE FAR-SEEING GENEROSITY MADE POSSIBLE THIS LABORATORY OF APPLIED PHYSICS IN TRIBUTE...

              THIS TABLET IS ENDURING EVIDENCE OF THE GRATITUDE OF PURDUE UNIVERSITY TO MRS. ALICE EARL STUART 1850 - 1937 WHOSE FAR-SEEING GENEROSITY MADE POSSIBLE THIS LABORATORY OF APPLIED PHYSICS IN TRIBUTE...

              • alice earl stuart
              • charles bene...
              • purdue university
              • west lafayette
              • indiana
              • laboratory o...
              • board of trustees

              Thomas Duncan Laboratory

              THIS LABORATORY IS DEDICATED TO THE MEMORY OF THOMAS DUNCAN GIRVAN, AYRSHIRE. SCOTLAND. DECEMBER 26, 1865 LAFAYETTE, INDIANA. JANUARY 21, 1929 "MAN IS THE MEASURE OF ALL THINGS"      Submitted by:...

              THIS LABORATORY IS DEDICATED TO THE MEMORY OF THOMAS DUNCAN GIRVAN, AYRSHIRE. SCOTLAND. DECEMBER 26, 1865 LAFAYETTE, INDIANA. JANUARY 21, 1929 "MAN IS THE MEASURE OF ALL THINGS"      Submitted...

              • thomas duncan
              • laboratory
              • west lafayette
              • indiana
              • purdue university

              Wayne State University

              WAYNE STATE UNIVERSITY   Here in the Central High building Completed in 1896 was founded in 1917 Detroit Junior College from which grew a College of Liberal Arts. It united with other colleges,...

              WAYNE STATE UNIVERSITY   Here in the Central High building Completed in 1896 was founded in 1917 Detroit Junior College from which grew a College of Liberal Arts. It united with other...

              • university
              • central high
              • detroit
              • wayne

              The Montgomery Slave Trade

              THE MONTGOMERY SLAVE TRADE Montgomery had grown into one of the most prominent slave trading communities in Alabama by 1860. At the start of the Civil War, the city had a larger slave population...

              THE MONTGOMERY SLAVE TRADE Montgomery had grown into one of the most prominent slave trading communities in Alabama by 1860. At the start of the Civil War, the city had a larger slave population...

              • montgomery
              • slavery
              • slave traders
              • eji
              • mississippi
              • alabama

              Downieville

              DOWNIEVILLE   DOWNIEVILLE IS HISTORICALLY ONE OF THE MOST IMPORTANT & COLORFUL TOWNS OF THE NORTHERN MINES. GOLD DEPOSITS WERE DISCOVERED IN 1848 - 1849. THE SPOT WHERE THE TOWN LATER DEVELOPED...

              DOWNIEVILLE   DOWNIEVILLE IS HISTORICALLY ONE OF THE MOST IMPORTANT & COLORFUL TOWNS OF THE NORTHERN MINES. GOLD DEPOSITS WERE DISCOVERED IN 1848 - 1849. THE SPOT WHERE THE TOWN LATER DEVELOPED...

              • downieville
              • california
              • gold
              • ecv

              Santa Fe de Toloca

                A Spanish Mission was established near here within sight of the Santa Fe River about A.D. 1606 by Franciscan missionaries. The river took its name from the mission, as did the modern town of...

                A Spanish Mission was established near here within sight of the Santa Fe River about A.D. 1606 by Franciscan missionaries. The river took its name from the mission, as did the modern town...

              • santa fe
              • toloca
              • la florida