1

Ancient ruin/lost city of a legendary race

2

Animal or monster or magical mutation

3

Invention/technology/magic (helpful, destructive)

4

New (or forgotten) god or planar entity

5

New (or rediscovered) artifact or religious relic

6

New land (island, continent, lost world, demi plane)

7

Otherworldly object (planar portal, alien spacecraft)

8

People (race, tribe, lost civilization, colony)

9

Plant (miracle herb, fungal parasite, sentient plant)

10

Resource or wealth (gold, gems, mithril)