I'm studying an English book instruction (Elementary 2). In a grammar part I've a sentence like this: 

> 
> 1. We walk home everyday.
> 
> 
> 

but my knowledge says it's wrong and it has omitted "*to*" **before** "*home*" and the right form of this sentence should look like this: 

> 
> 2. We walk **to** home everyday.
> 
> 
> 

Which one is true? It would be great if you explain WHY?