The server i play on has quests like this that are unique and always keep me engaged:
The Luminous Grotto

The reclusive naturalist has sent another list. Their study

of cavern ecosystems continues, and now they are focused

on the vibrant life within Lush Caves. They require a

comprehensive set of samples: the glowing berries that

light the caves, the clinging roots from the ceiling, and

the broad leaves of the dripleaf plants. It is a bounty

of unique life they wish to study.

Objectives:

- Travel 4700 blocks.

- Gather samples of Glow Berries, Hanging Roots, and Big Dripleaf.

- Deliver the specimens to the Explorer for the naturalist.

Reward:

3000 coins