What is associated with: completed in 1942 this dam contains about 12 million cubic yards of concrete?

What is associated with: completed in 1931 this structure required 10 million bricks a true stairmaster would climb its… What is associated with: completed in 1932 it bears the inscription here rests in honored glory an american soldier kno… What is associated with: completed in 1937 this 2000 mile hiking trail passes through 14 states? What is associated with: completed in 1937 this span cost 35 million to build? What is associated with: completed in 1955 this bridge crosses the hudson near nyack? What is associated with: completed in 1965 it towers 630 feet over st louis? What is associated with: completed in 2001 the grand one of these in muscat is the 1st in the country to be open to non… What is associated with: completed in 2007 the water cube is one of the newer buildings in this city?