The location of the buried treasure remains a mystery.

The missing boy was located by police

Central Park is located in the heart of New York City

The museum is located on Elm Street.

Cairo, USA, is located at the junction of the Mississippi and Ohio rivers.

Tropical rainforests are located near the equator.
Located between, behind, underneath, on top of


As you can see, there is no rule about 'locate'. Which preposition you use depends on the meaning of the preposition.

"We will have a lot of fun."

Thanks a lot
It was of great help