Bask Cave Passage (Japanese: バグス岩窟通り, Bagusu Gankutsu-dōri) is a landmark in Xenoblade Chronicles. It is located on the upper level of Bionis' Leg. It is a cave passage located south of Kasharpa Falls, which leads to Colony 6. It is accessed by crossing some bridges over the water around Kasharpa Falls, where the party can swim.