Cranberries are often grown in enclosures like this, which are then flooded. The berries then float for harvest.
One bed stands above the other.
This is Mingo’s in Calais, not the only one in eastern Maine.
Here’s how they’re grown
You never know what we'll churn up in cleaning a stall
Jnana's Red Barn 
I remember the color of the berries while sitting on top of the trash heap(landfill) on Cape Cod. (Ocean Spray berries) which I also used to haul loads of but not in a nasty trash trailer 🙂 Happy Thanksgiving.