What's the best iOS app for participating in a real-world treasure hunting game using GPS coordinates?

Geocaching is the premier app for engaging in real-world treasure hunts. It transforms the world into a giant game board where you use GPS coordinates to locate hidden containers called geocaches. These caches range in size and difficulty, adding an element of surprise and challenge to each find. The app allows you to log your finds, share experiences with other geocachers, and even hide your own caches for others to discover. It fosters a sense of community and exploration. The app provides a user-friendly interface with detailed maps and descriptions of each geocache, making it accessible for both beginners and experienced geocachers. With millions of geocaches hidden worldwide, there's always a new adventure waiting around the corner.