Decor and furniture
Sign Canvas Wood 5x2
It's a sign. You write things on it.
Harvest drops
Wood× 2
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves 
Wood Debris (Terrain) (75% of the time) where it lands.
Where to find (13 POIs)
Higashi Pharmaceutical (tier 5), Beanthere Coffee Company (tier 4), Housing Development (tier 4), Hybrid Energy (tier 4), 4 Ever Video (tier 3), Elzner's Emporium (tier 3), Poopy Pants City Daycare (tier 3), Duke's General (tier 2), Pal's Marina (tier 2), Smorgasbord Square (tier 2), Bark Buzz Business Complex, Couch Kingz Court, Critic's Corner.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.