Tapestry
Is each landmark unique, or does every track have its own set of landmarks?
The rulebook says there is exactly one of each landmark.
- Tapestry rulebook · Rulebook · There Are 2 Categories of Buildings
Each landmark exists once in the game, so there is exactly one of each. Whoever first earns it (for example by being first into a track tier) takes it, and nobody can gain the same landmark again.