Of all the dive sites off the shores of Lana'i, this may be the most famous. It has a second dive site named after it. It is actually an enormous lava tube (100 feet long and about 20 feet high). The reflection of sunlit blue water in the tube looks remarkably like a stained glass window. The effect has inspired comparisons to a Renaissance-period Catholic church. Inside the tube live dozens of unusual little fish and crustaceans. The waters outside the tube are also busy with the activity of sea-dwelling creatures.