What is the makapuu lighthouse made of?

When you put water into the empty can is it really empty? Do Amazonian tribes have rulers? Is a turtle a desert animal? Why Kullu valley is more popular with the tourists? Where are there other sphinxes? Why do bears live in forest? What city stands on the river nene? How are oceans and rivers alike? Does it snow in March at niagara falls? Can you fly if you jump of a brige? What river starts in the highlands of Guinea and then flows northeast and south to the empty into the Atlantic at the gulf of guinea? How come ghost rider is always closed at knott's berry farm in buena park? What are the Blue Ridge Mountains a source of? What does quasi modo mean? Why would people attack a castle? What river passes below Machu Picchu and through Ollantaytambo? How did John Quincy Adams become president with fewer votes than his opponent? Why do mountains in Arizona appear purple at sunset? What is the name of the oldest bridge that is still working? How did the guanaco adapt to the environment of the Atacama Desert?