The Drum Rockies are a chain of drum-shaped mountains on Drum Island. The middle one is the largest. One of the mountains contains a castle, with Hiluluk's flag on the tallest spire, on top that Wapol used to live, but now Kureha resides there. They first appeared in Chapter 132 and Episode 79.
According to Dr. Kureha, the peak plateau of the highest of the Drum Rockies lies more than a staggering 5000m over sea level.
- ↑ Episode 84, Doctor Kureha expresses disbelief at Luffy's feat of climbing to her castle with his bare hands while carrying two people.