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

Coit Tower Semaphore

An unusual and short lived semaphore system at Coit Tower: "During gold rush days a look-out stationed in a structure on this spot observed and signalled the arrival of incoming vessels, by...

An unusual and short lived semaphore system at Coit Tower: "During gold rush days a look-out stationed in a structure on this spot observed and signalled the arrival of incoming vessels,...

  • san francisco
  • tower
  • bay area
  • coit
  • tower

Coit Tower

Coit Tower  This 210 foot monument was built in 1933  with monies bequeathed by Lillie Hitchcock Coit to beautify the city she loved. Frescoes were pointed in the interior of the newly built...

Coit Tower  This 210 foot monument was built in 1933  with monies bequeathed by Lillie Hitchcock Coit to beautify the city she loved. Frescoes were pointed in the interior of the newly built...

  • san francisco
  • tower
  • bay area
  • coit tower

What Cheer House

Site ofWhat Cheer House This is the site of the famouse What Cheer House,a unique hotel opened in 1852 by R. B. Woodwardand destroyed by the fire of 1906. The What Cheer House catered to men only,...

Site ofWhat Cheer House This is the site of the famouse What Cheer House,a unique hotel opened in 1852 by R. B. Woodwardand destroyed by the fire of 1906. The What Cheer House catered to men...

    George Washington Statue, University of Washington

    "Presented to the University of WashingtonJune 14, 1909 by Rainier Chapter Daughtersof the American Revolution. Assisted by thesons and daughters of the American Revolutionby the school children...

    "Presented to the University of WashingtonJune 14, 1909 by Rainier Chapter Daughtersof the American Revolution. Assisted by thesons and daughters of the American Revolutionby the school children...

    • seattle
    • washington
    • george washington
    • statue

    The Golden Fire Hydrant

      "Though the water mains were broken and dry on April 18, 1906 yet from this Greenberg hydrant on the following night there came a stream of water allowing the firemen to save the Mission...

      "Though the water mains were broken and dry on April 18, 1906 yet from this Greenberg hydrant on the following night there came a stream of water allowing the firemen to save the Mission...

    • san francisco
    • fire hydrant
    • bay area
    • fire
    • 1906
    • california

    The Real Linus

    The Real Linus Linus Maurer (son of Nick and Ella) was borned and raised in Sleepy Eye, Minnesota. He spnt four years in the Navy durin World War 2 and then went on tu study art at the Minneapolis...

    The Real Linus Linus Maurer (son of Nick and Ella) was borned and raised in Sleepy Eye, Minnesota. He spnt four years in the Navy durin World War 2 and then went on tu study art at the...

    • linus
    • peanuts
    • schulz

    Western Maryland Station

        Plaque in Gettysburg where Lincoln's train arrived Nov 1863 to deliver Gettysburg Address:   "Western Maryland StationThis is the original station wherePresident Lincoln's train arrived...

        Plaque in Gettysburg where Lincoln's train arrived Nov 1863 to deliver Gettysburg Address:   "Western Maryland StationThis is the original station wherePresident Lincoln's train...

    • lincoln
    • gettysburg
    • train

    John Pool

    Walked across Cape Ann from Gloucester through Dogtown & made sure to stop & #ReadThePlaque before reaching Rockport: "John Pool Here stood the first framed house in Sandy Bay (Rockport) built in...

    Walked across Cape Ann from Gloucester through Dogtown & made sure to stop & #ReadThePlaque before reaching Rockport: "John Pool Here stood the first framed house in Sandy Bay (Rockport) built in...

    • rockport
    • sandy bay
    • long wharf
    • boston

    Quaternion Bridge

    Here as he walked by on the 16th of October 1843 Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication i² = j² = k² = ijk = −1 & cut it...

    Here as he walked by on the 16th of October 1843 Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication i² = j² = k² = ijk = −1 & cut it...

    • math
    • quaternion
    • bridge
    • hamilton
    • dublin
    • ireland

    Most Beautiful Steel Bridge, Class II, 1960

    "American Institute of Steel ConstructionAnnual Award of MeritMost Beautiful Steel Bridge Class II   1960" Submitted by @phillydesign

    "American Institute of Steel ConstructionAnnual Award of MeritMost Beautiful Steel Bridge Class II   1960" Submitted by @phillydesign

    • steel
    • bridge
    • award
    • beautiful

    Mary Todd Lincoln House

    "Mary Todd Lincoln House Buildin 1806 as an inn. Becamehome of politician & businessmanRobert S. Todd in 1832. Mary Todd,his daughter, born in Lexington on Dec. 13, 1818, moved to IL in...

    "Mary Todd Lincoln House Buildin 1806 as an inn. Becamehome of politician & businessmanRobert S. Todd in 1832. Mary Todd,his daughter, born in Lexington on Dec. 13, 1818, moved to IL...

    • lincoln
    • todd
    • mary todd
    • mary todd lincoln

    From Albany to Buffalo

    Erie Canal Heritage Trail  'The Great Embankment'  Completed 1822 is one mile long, 70 feet high across Irondequoit Creek Valley  Pittsford Bicentennial 1989. Submitted by @toddnatti

    Erie Canal Heritage Trail  'The Great Embankment'  Completed 1822 is one mile long, 70 feet high across Irondequoit Creek Valley  Pittsford Bicentennial 1989. Submitted by @toddnatti

    • albany
    • buffalo
    • erie
    • canal
    • embankment
    • creek

    Phillip Burton Wilderness

      The Woodland Opera House

      "The Woodland Opera House The first opera house to serve the SacramentoValley was build on this site in 1885. The presentstructure was built in 1895-1896, ontinues to representan important center...

      "The Woodland Opera House The first opera house to serve the SacramentoValley was build on this site in 1885. The presentstructure was built in 1895-1896, ontinues to representan important center...

      • woodland
      • opera
      • house

      Bear Valley Visitor Center

      Vistor Center at Point Reyes National Seashore "Bear Valley Visitor Center This visitor and interpretive center was the dream of William Field(1910 - 1978), a longtime conservationist and friend...

      Vistor Center at Point Reyes National Seashore "Bear Valley Visitor Center This visitor and interpretive center was the dream of William Field(1910 - 1978), a longtime conservationist and friend...

      • california
      • point reyes
      • seashore
      • sea
      • shore

      Aboriginal Veterans' Memorial

          "This memorial is deidcated to all Aboriginal menand women from South West Victoria who servedtheir country proudly along with fellowAustralians since World War I We say thinks to those who...

          "This memorial is deidcated to all Aboriginal menand women from South West Victoria who servedtheir country proudly along with fellowAustralians since World War I We say thinks to those who...

      • south west victoria
      • australia
      • aboriginal
      • wuwuurk

      W. Green Deschamps. Jr Highway

      W. Green Deschamps Jr. Highway

      W. Green Deschamps Jr. Highway

      • south carolina
      • highway

      Hotaling Building

      Old SF. "HOTALING BUILDING Built in 1866 and occupied by A. P. Hotaling& Co., this building housed the largest liquorrepository on the West Coast. It survived the1906 earthquake and fire due to a...

      Old SF. "HOTALING BUILDING Built in 1866 and occupied by A. P. Hotaling& Co., this building housed the largest liquorrepository on the West Coast. It survived the1906 earthquake and fire due to a...

      • san francisco
      • whisky
      • bay area
      • fire
      • 1866

      Remembering our Ohlone ancestors

      "Rememberingour Ohlone Ancestors This was their world.Then other people came& their world changede.Now our voices & footstepsjoin theirs as part of theliving history of this ancient place." Pretty...

      "Rememberingour Ohlone Ancestors This was their world.Then other people came& their world changede.Now our voices & footstepsjoin theirs as part of theliving history of this ancient place." Pretty...

      • ohlone
      • emeryville
      • bay area
      • comic sans

      New Jersey State Museum

      "Founded in 1897,the State Museum collects,preserves, interprets and exhibitsover a wide range of subjects -from fossils to fine art,Native American toolsto the finest sliver,quilts to comets...

      "Founded in 1897,the State Museum collects,preserves, interprets and exhibitsover a wide range of subjects -from fossils to fine art,Native American toolsto the finest sliver,quilts to comets...

      • trenton
      • new jersey