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

Site of the World's First Radio Telescope

In 1937 Grote Reber, a 26 year old radio engineer, built the world's first radio telescope in the side yard of his home that stood here at 212 West Seminary Street, now Karlskoga Avenue. For ten...

In 1937 Grote Reber, a 26 year old radio engineer, built the world's first radio telescope in the side yard of his home that stood here at 212 West Seminary Street, now Karlskoga Avenue. For...

  • radio telescope
  • wheaton
  • illinois
  • grote reber

Cobblestone Landing

There were several boat landings in this general area during the nineteenth century. An 1827 drawing shows a public landing approximately one-half mile north of this spot, but changes in the...

There were several boat landings in this general area during the nineteenth century. An 1827 drawing shows a public landing approximately one- half mile north of this spot, but changes in...

  • shelby county
  • tennessee

Margaret Polk

Margaret Polk was a Memphis resident and a graduate of The Hutchison School. While a student at Southwestern at Memphis, she dated Pilot Robert Morgan prior to his deployment overseas. Bob named...

Margaret Polk was a Memphis resident and a graduate of The Hutchison School. While a student at Southwestern at Memphis, she dated Pilot Robert Morgan prior to his deployment overseas. Bob...

  • shelby county
  • tennessee

In Memory of Marcus Flohr

IN MEMORY OF MARCUS FLOHR SHERIFF OF SONOMA COUNTY A TRUE SPORTSMAN ERECTED 1934 BY SONOMA CO SPORTSMANS CLUB INC Submitted by @crystalschimpf

IN MEMORY OF MARCUS FLOHR SHERIFF OF SONOMA COUNTY A TRUE SPORTSMAN ERECTED 1934 BY SONOMA CO SPORTSMANS CLUB INC Submitted by @crystalschimpf

  • sheriff
  • sonoma
  • california
  • sportsman

Gordon House

Gordon House Built in the early 1850's of lumber brought from Australia. One of the early "milled lumber" houses in California.

Gordon House Built in the early 1850's of lumber brought from Australia. One of the early "milled lumber" houses in California.

  • monterey
  • california
  • gordon
  • 1850
  • australia

Colton Hall

COLTON HALL  Headquarters of California's Constitutional Convention 1849

COLTON HALL  Headquarters of California's Constitutional Convention 1849

  • monterey
  • california
  • constitution
  • 1849

Knudsen

IN MEMORY OF GERTRUDE B. KNUDSEN 1971

IN MEMORY OF GERTRUDE B. KNUDSEN 1971

  • monterey
  • california
  • knudsen
  • 1971

St. John's United Methodist Church

The earliest members of this church were among the founders in 1832 of Methodism in Memphis. This congregation, established in 1859 as Central Church Mission, first met on Union Avenue. St....

The earliest members of this church were among the founders in 1832 of Methodism in Memphis. This congregation, established in 1859 as Central Church Mission, first met on Union Avenue....

  • shelby county
  • tennessee

Christopher Columbus Park

This park is dedicated in honor of the Italian American Community of Memphis and to their contribution to the heritage and growth of the city. The park was made possible through the generosity of...

This park is dedicated in honor of the Italian American Community of Memphis and to their contribution to the heritage and growth of the city. The park was made possible through the generosity of...

  • shelby county
  • tennessee

Elvis Presley and Sun Records

In July 1954 Sun Records released Elvis Presley's first recording. That record, and Elvis' four that followed on the Sun Label, changed popular music. Elvis developed an innovative and different...

In July 1954 Sun Records released Elvis Presley's first recording. That record, and Elvis' four that followed on the Sun Label, changed popular music. Elvis developed an innovative and different...

  • shelby county
  • tennessee

Chickasaw Guards

Erected by The Chickasaw Guards of Memphis In Memory Of Their Comrades Who Died On The Field Of Battle In World War I 1st Lieut. Henry Guion Armstrong Killed in Meuse-Argonne Battle, France...

Erected by The Chickasaw Guards of Memphis In Memory Of Their Comrades Who Died On The Field Of Battle In World War I 1st Lieut. Henry Guion Armstrong Killed in Meuse-Argonne Battle,...

  • shelby county
  • tennessee
  • wwi

Bridgewater School

Bridgewater School, formerly on this site, was founded in 1911 and existed continuously at this site until 1960. In 1921, with help from the community, the Shelby County school board, and the...

Bridgewater School, formerly on this site, was founded in 1911 and existed continuously at this site until 1960. In 1921, with help from the community, the Shelby County school board, and...

  • shelby county
  • tennessee

Moon Tree

COAST REDWOOD SEQUOIA SEMPERVIRENS  THIS "MOON TREE" IS A COAST REDWOOD GROWN FROM A SEED THAT IN JANUARY 1971 WAS CARRIED TO THE MOON AND BROUGHT BACK TO EARTH BY MAJOR STUART ROOSA,...

COAST REDWOOD SEQUOIA SEMPERVIRENS  THIS "MOON TREE" IS A COAST REDWOOD GROWN FROM A SEED THAT IN JANUARY 1971 WAS CARRIED TO THE MOON AND BROUGHT BACK TO EARTH BY MAJOR STUART...

  • monterey
  • california
  • moon
  • redwood
  • apollo
  • forest genetics
  • roosa
  • moon tree
  • apollo 14
  • space tree

Rickwood Field

    Built by local industrialist A. H. "Rick" Woodward, Rickwood Field served as home to the Birmingham Barons and Birmingham Black Barons for most of the 20th century. Recognized as "America's...

    Built by local industrialist A. H. "Rick" Woodward, Rickwood Field served as home to the Birmingham Barons and Birmingham Black Barons for most of the 20th century. Recognized as...

  • birmingham
  • alabama
  • baseball
  • rickrood
  • babe ruth
  • ty cobb
  • willie mays
  • reggie jackson

Mrs. Gardner's Address

As a young bride living at No. 152 Beacon Street (now demolished), Isabella Stewart Gardner began surrounding herself with art and legend. During 40 years she amassed a fabulous collec-tion of art...

As a young bride living at No. 152 Beacon Street (now demolished), Isabella Stewart Gardner began surrounding herself with art and legend. During 40 years she amassed a fabulous collec-tion of art...

  • boston
  • massachusetts
  • back bay
  • beacon st
  • art
  • gardner

Janet Lady Clarke Rotunda

Plaque reads: 'This building Erected by the public of Victoria  As a tribute to the memory of A high example of the beneficence and public spirit Janet Lady Clarke Was committed to the perpetual...

Plaque reads: 'This building Erected by the public of Victoria  As a tribute to the memory of A high example of the beneficence and public spirit Janet Lady Clarke Was committed to the perpetual...

  • rotunda
  • melbourne
  • australia

Rutherglen Leopard Tank

Found next to the kids playground in rural Australia Plaque reads  'In recognition of the gifting of this Leopard main battle tank by the Commonwealth Government of Australia to the Rutherglen...

Found next to the kids playground in rural Australia Plaque reads  'In recognition of the gifting of this Leopard main battle tank by the Commonwealth Government of Australia to the Rutherglen...

  • tank
  • rsl
  • australia
  • wwii

Collins Chapel Christian Methodist Episcopal Church

A "Daughter" of Wesley Chapel (later, the First United Methodist Church), Collins Chapel was organized in 1841 and purchased this site in 1859. Named for its first pastor, J.T.C. Collins, it...

A "Daughter" of Wesley Chapel (later, the First United Methodist Church), Collins Chapel was organized in 1841 and purchased this site in 1859. Named for its first pastor, J.T.C. Collins,...

  • shelby county
  • tennessee

Pleasant Hill Cemetery

This cemetery, founded in 1853, grew up around the Brunswick Cumberland Presbyterian Church, which has since moved. During the Confederate War, the church building was used as a hospital and 17...

This cemetery, founded in 1853, grew up around the Brunswick Cumberland Presbyterian Church, which has since moved. During the Confederate War, the church building was used as a hospital and...

  • shelby county
  • tennessee

Forrest's Early Home

In a house which stood here in antebellum days lived Nathan Bedford Forrest. Born in middle Tennessee, 1821, he spent his early life on a Mississippi plantation. Following marriage in 1845, he...

In a house which stood here in antebellum days lived Nathan Bedford Forrest. Born in middle Tennessee, 1821, he spent his early life on a Mississippi plantation. Following marriage in 1845, he...

  • shelby county
  • tennessee