Geocaching involves using clues and GPS coordinates to find hidden containers. The document describes a geocaching adventure where a group: 1) Used clues found in photos and by asking locals to determine coordinates for the next clue. 2) Spent over an hour searching using QR codes and clues about statues, names, and palm trees to find subsequent coordinates. 3) Finally discovered the correct coordinates worked when eliminating the last number, leading them to find the geocache containing names inside.