On Peleliu Island, which is south of the stunning Rock Islands, are steep limestone cliffs that hide caves, as well as World War II planes, tank and war paraphernalia scattered about the island. The surrounding reef island measures 4.6 miles in length, and are somber reminders of the titanic battle that was fought on the island between American and Japanese forces in 1944. Derelict tanks, amphibious landing ramps, airplane propellers, bomb casings and steel helmets now dot the landscape and a War Museum has been set up for viewing smaller artillery and other items of interest.