Earth-90

Earth-90 was a universe from the Original Multiverse. All its resident were killed by The Monitor before being completely disintegrated by antimatter a year later.

Locations

 * Earth
 * United States of America
 * Arkham
 * California
 * Central City
 * Chicago
 * Metropolis
 * New York
 * St. Louis
 * Paris
 * Great Britain
 * Italy

Season 7

 * "  (mentioned) ​" (mentioned) ​
 * "  (mentioned) ​" (mentioned) ​

Season 2

 * "  (vision) ​"  (vision) ​

Trivia

 * The number 90 is a reference to the year which the original Flash show started which is 1990.