GoGo Sentai Boukenger focused on the search for Precious artifacts.

These objects could possess dangerous or extraordinary powers, giving the Rangers a reason to travel to different locations and investigate different mysteries.

The team therefore functioned almost like a superhero expedition group.

The concept allowed each episode to feel like a separate adventure while still contributing to a larger mythology.

Boukenger showed how Super Sentai could borrow ideas from archaeology, adventure movies, treasure hunts, and superhero fiction and combine them into one series.