"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
Venus: Venus is the second closest planet to the Sun. It is similar in size to Earth and features thick a thick atmosphere which locks in heat as the surface rages with active volcanoes.