EarthCache™ Collection

Each year, The Geological Society of America celebrates International EarthCache Day on the first Sunday of Earth Science Week and the last Sunday of World Space Week. 

For 2025, International EarthCache Day is October 12th.  Earn the 2025 souvenir when you find an EarthCache on October 10th to the 13th! 

For more information about International EarthCache Day, please click here.