Outdoors

By the numbers for Sept. 20

2.5 million

The approximate number of geocaches placed in more than 180 countries worldwide. When geocaching.com was launched in September 2000, it started with 75 caches. According to organizers of the website, there are more than 6 million people currently taking part in the high-tech treasure hunt. Geocachers use GPS coordinates and clues to find the hidden caches.

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