The chain of jagged limestone ridges in the middle of the island where the heaviest fighting took place. The American memorial sits at the top of one of the highest points, with a steep concrete staircase climbing through the jungle to a viewing platform with sweeping views over the airfield, the lagoon, and the surrounding islets.
The ridge is honeycombed with Japanese cave defences, many of them still partly accessible. Don't go off the marked paths — there is unexploded ordnance throughout. Allow an hour for the climb and the memorial.