Prepositions can be used to show movement.
For example:-
to, through, across
We use to to show movement with the aim of a specific destination.
For example:-
I moved to Germany in 1998.
He's gone to the shops.
We use through to show movement from one side of an enclosed space to the other.
For example:
The train went through the tunnel.
We use across to show movement from one side of a surface or line to another.
For example:
She swam across the river.