On April 24, 2006, the grotto was closed by the Hawaii State Department of Land and Natural Resources for safety reasons. Heavy rains in March, 2006, caused a number of rocks and boulders to fall from the ceiling of the grotto onto the viewing area below.
On April 24, 2006, the grotto was closed by the Hawaii State Department of Land and Natural Resources because of safety issues. The heavy rainfall in March 2006 caused a number of rocks and boulders to fall from the ceiling and land on the viewing platform.