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

Rochfort Trestle, AB

Rochfort Trestle The community was named after an English homesteader, Cowper Rochfort. The Canadian Northern Railroad constructed the railway and bridge in 1919. The trestle was built with a...

Rochfort Trestle The community was named after an English homesteader, Cowper Rochfort. The Canadian Northern Railroad constructed the railway and bridge in 1919. The trestle was built with a...

  • rail
  • railway
  • trestle
  • train
  • alberta
  • se-24-57-05

Wildfire Memorial Kamloops

During the summer of 2003 the Thompson-Nicola region endured its most devastating wildfires ever. Unprecedented in numbers and massive in scope, the fires destroyed 89 homes and 7 businesses,...

During the summer of 2003 the Thompson-Nicola region endured its most devastating wildfires ever. Unprecedented in numbers and massive in scope, the fires destroyed 89 homes and 7 businesses,...

  • wildfire
  • memorial
  • kamloops
  • bc

Marconi's First Radio Transmissions Across Water

1897 1947 NEAR THIS SPOT THE FIRST RADIO MESSAGES WERE EXCHANGED ACROSS WATER BY GUGLIELMO MARCONI AND GEORGE KEMP BETWEEN LAVERNOCK AND FLAT HOLM 11th MAY, LAVERNOCK AND BREAN DOWN 18th MAY 1897...

1897 1947 NEAR THIS SPOT THE FIRST RADIO MESSAGES WERE EXCHANGED ACROSS WATER BY GUGLIELMO MARCONI AND GEORGE KEMP BETWEEN LAVERNOCK AND FLAT HOLM 11th MAY, LAVERNOCK AND BREAN DOWN 18th MAY 1897...

  • marconi
  • wireless
  • radio transmission

The Comfort Maple

This tree believed to be Canada's oldest sugar maple (Acer Saccharum) was accepted for its preservation April 30 1961 by the Niagara Peninsula Conservation Authority from Miss Edna Eleanor...

This tree believed to be Canada's oldest sugar maple (Acer Saccharum) was accepted for its preservation April 30 1961 by the Niagara Peninsula Conservation Authority from Miss Edna Eleanor...

  • maple tree
  • natural monument
  • canada
  • ontario
  • comfort maple

William Budd lived here

Submitted by: Alistair Wylie

Submitted by: Alistair Wylie

  • william budd
  • epidemiology
  • infectious diseases

Ashburn Colored School

On this site stands Ashburn Colored School, a one-room public schoolhouse built ca. 1892 for African American students. Virginia's public school system, established in 1870, was racially...

On this site stands Ashburn Colored School, a one- room public schoolhouse built ca. 1892 for African American students. Virginia's public school system, established in 1870, was...

  • historic school
  • segregation

Snake River Watershed Protection and Flood Prevention Project

Why would anyone from Chicago or the San Francisco Bay Area find themselves driving through Warren, Minnesota. In my case, it's because my dad was born there in 1921, and in the summer of 2018 I...

Why would anyone from Chicago or the San Francisco Bay Area find themselves driving through Warren, Minnesota. In my case, it's because my dad was born there in 1921, and in the summer of 2018...

  • minnesota
  • marshall county
  • warren
  • flood control
  • red river of...
  • snake river

Marc von Trapp

Submitted by Erin Wilson

Submitted by Erin Wilson

    West Oakland Multi- Service Center

      Francis Marion Smith