preposition omission with "there" "here" and "where"?

Why are some prepositions usually omitted with "there", "here" and "where"? And it often sounds strange to say these:
`
to here/there/where
at here/there/where
into here/there/where
onto here/there/where
`
And someone would even say "You'd better come up from there!" as "You'd better come up there!". And would a native speaker be more likely to omit "to" in this sentence?
`
Take this back to where it belongs.

Please answer me.

In your example, many (if not most) English speakers would say,

"Take this back where it belongs."

However, "Take this back to where..." does not sound awkward or ungrammatical to me.

As a rule, prepositions are unnecessary and awkward when used with adverbs of location, direction, and arrangement.