The castle of Calders -or its remaining half tower- is located on top of a hill that’s limited by the abandoned meander of river Calders.
There is no river in the fields in front; the river used to go through them some thousand years ago, but not anymore. Nowadays, the river Calders goes straight behind the castle.
The castle bases on characteristic of Calders, coral reef originated limestone. The river had to flow millions of years to dig out the tough limestone to isolate the hill. On the right of the image, the mill is indeed near to the current river way.
[photo Jordi Badia]