Usage patterns
〈場所〉の池the pond in a place (e.g. garden, park)
There are many carp in the park's pond.
池に落ちるto fall into a pond
The child fell into the pond.
池で〈動詞〉to do something in/at a pond (e.g. fish, swim)
I like fishing in the pond.
池を掘るto dig a pond
We dug a small pond in the garden.