When was the coliseum builled?

What is the name for the top layer of ocean water that extends to 300 m below sea level? What is the cost for a Playmobile Castle? How do the maasai benefit from tourism? Why wood peckers make holes? What is the difference between rivers and wetlands? What name deposit that forms when a mountain river runs onto a plain? What is the longitude of Nevada Del Ruiz? Why doesn't increased tourism necessarily benefit people in Caribbean island countries? Why is it important to find new sources of water and to conserve the sources now available? Is the 1906 Ellis island liberty coin real? When the oceans beame highways what changed? What treaty set the Rio Grande as the boundary between Mexico and the US? The largest tropical rain forest in the world is located where? What city straddles two continents on the Sea of Marmara? Was there any museums named after francis crick? Who really controlled the canal according to edward said? How are the river plains thickly populated? What is a fire division wall in a building? Does Universal Studios have the Jaws ride? Where is the Portage Lake Historical Society in Portage Lake Maine located?