Points of Interest is a starting card that boosts your score if you surround it with the same type of block.
This is the first Point of Interest that introduces new rules. This rainbow is also a road, and it's a road that does not count towards your road tax. If you ever needed a little buff to help your score, Points of Interest is there for you, and this one can help prevent you from losing yet another point (actually 2 points in Naturopolis!).
This 1-card expansion (almost) mirrors Sprawlopolis: Points of Interest.
-description from developer
