Ning and the rest left the hammer there. There was no point in using it, given that it would still take quite some time before the Hammer would be of much use.
As it was, it wasn't nearly strong enough to be a good treasure. So, instead, they went to look for the strong treasures.
A week of travel through the ocean led the group directly to the other side of the planet from where they had started, and they arrived at a location where there was a treasure and a monster who guarded it.
Ning defeated the monster easily, getting the treasure. It was the spectacle treasure Ning had told Tim about, which he wore immediately.
Once he got the treasure, Ning and the rest made their way to another random location.
They went to the city of Garro in the Kingdom of Altaria. There, they spent their time going around the city and enjoying its scenery for nearly a week before they left the place.