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

Crossing the river

    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