Which ballpark's Western Metal Supply Co. building forms part of the left-field corner?

Which ballpark is known for its fountains and waterfalls beyond the outfield? Which ballpark has a swimming pool beyond the outfield fence? At which ballpark does Bernie Brewer ride a slide after home runs? Which ballpark is known for the Chavez Ravine location and a view of the San Gabriel Mountains? Which ballpark, opened in 1912, is the oldest in Major League Baseball? Which ballpark is the second-oldest in Major League Baseball, opened in 1914? Which ballpark overlooks the Allegheny River and the Roberto Clemente Bridge? Who won the 1990 AL MVP?