Chichen Itza
Chichen - Itza, world famous archaeological zone, is located 120 km from Merida via federal highway 180 in the State of Yucatan Mexico .
Chichen Itza has been widely studied, and excavated and restored more than any of the other Mayan cities. Yet its history is still clouded in mystery and there are many contradicting theories and legends. It is clear that a large Mayan community thrived here between around 700AD and 900AD, and built most ofthe structures in the southern area. However, the main buildings in the central area, including the Pyramid of Kukulkan, the Temple of the Warriors and the Ball Court , are Toltec in design and influence.
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niagara falls
Niagara Falls is composed of two major sections separated by Goat Island: Horseshoe Falls, on the Canadian side of the border and American Falls on the United States side. The smaller Bridal Veil Falls also is located on the American side, separated from the main falls by Luna Island. Niagara Falls were formed when glaciers receded at the end of the Wisconsin glaciation (the last ice age), and water from the newly-formed Great Lakes carved a path through the Niagara Escarpment en route to the Atlantic Ocean.
Over the last century the American Falls has undergone a dramatic face lift due to natural forces of erosion. The natural bedrock is composed of soft shale and limestone.Over the years the continual flow of water causes large sections of bedrock to fall and remain at the base of the cataracts.Geologists predict that eventually the American Falls will transform into a succession of descending rapids.