Question

1 known as /at Moscow /a huge park /the Peace Park /there is

Answer 1

Hello

Here's your answer -

There is a huge park at Moscow known as the Peace park.

or At Moscow, there is a huge park known as the Peace park.

The sentence can be made more clear by adding few words -

There is a huge park in Moscow which is known as the Peace park.

According to the sentence reordering question, you can go with the first one.

Answer 2

Answer:

There is a huge park at Moscow known as the Peace park

Explanation: