geo·caching
noun/ˈdʒiːəʊkæʃɪŋ/
/ˈdʒiːəʊkæʃɪŋ/
[uncountable]- an activity in which people go out to look for a hidden object (usually a box containing a small item and a record of who has found it) using GPS (= a system that uses signals from satellites to show somebody/something’s position on earth)
地理藏宝（利用全球定位系统寻找隐藏物的户外活动）