Geocaching

2 clues
Coordinated activity?
21st-century pastime for treasure hunters
Similar answers:
Aching
Achingjoints
Achingly
Arching
Archingband
Ascreechinghalt
Attaching
Bearswatching
Beeching
Benching
Bennyetching
Bennypinching
Bewitching
Bingewatching
Birdwatching
Blanchingpaths
Bleaching
Branching
Breaching
Breachingwhales