Help!

In kh1 Im stuck at halloween town I start following those kids and they go up the swirley hill and when i go over there i can't figure out where to go i searched it up a walkthrough and this confused me

On the hill in the center, opposite the little curling top, is a small gravestone, just on the other side of a low stone wall. Examine that gravestone to open up a path to Oogie's Manor. Walk across the bridge and through the gate in the next area to get there.