Since 2004, EarthCaches have encouraged geocachers to explore and celebrate the extraordinary geologic features of our planet, like these colorful rock formations in China. Shaped over millions of years by tectonic forces and erosion, the painted hills of Zhangye National Geopark are among the world’s most colorful natural wonders.

Earn the International EarthCache Day 2026 souvenir by visiting any EarthCache and completing the logging requirements from Friday, October 9 through Sunday, October 11, 2026.

All non-Premium EarthCaches are open to everyone throughout the weekend on the Geocaching® app from 11:00:00 UTC on Friday, October 9 until 10:00:00 UTC on Monday, October 12, 2026.

EarthCaches do not have physical containers. Instead, they take you to a unique geological feature. Study your surroundings, answer the questions listed in the cache description, and send them in a message to the cache owner. Then, log your find online!

What kind of EarthCache will you visit on International EarthCache Day? Find an EarthCache near you!