Large areas of land or water.
Swaths can be beautiful or useful, like a big field of flowers or a wide river. But they can also be dangerous, like a big area of deep water.
Examples:
The farmer planted seeds in the swath of land.
The storm caused a swath of destruction.
We walked through a swath of tall grass.
The dragonfly flew over the swath of water.
The forest fire left a swath of blackened trees.
The rainbow stretched across the swath of sky.